CN113788914B - SEBS/AT composite toughening agent, preparation method thereof and high-performance PET/PA6 foaming material - Google Patents
SEBS/AT composite toughening agent, preparation method thereof and high-performance PET/PA6 foaming material Download PDFInfo
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- 229920001935 styrene-ethylene-butadiene-styrene Polymers 0.000 title claims abstract description 131
- 239000012745 toughening agent Substances 0.000 title claims abstract description 109
- 239000002131 composite material Substances 0.000 title claims abstract description 99
- 239000000463 material Substances 0.000 title claims abstract description 86
- 238000005187 foaming Methods 0.000 title claims abstract description 38
- 238000002360 preparation method Methods 0.000 title claims abstract description 33
- 239000007822 coupling agent Substances 0.000 claims abstract description 77
- 238000000034 method Methods 0.000 claims abstract description 60
- 238000003756 stirring Methods 0.000 claims abstract description 55
- 238000002156 mixing Methods 0.000 claims abstract description 46
- 239000003999 initiator Substances 0.000 claims abstract description 30
- 238000005859 coupling reaction Methods 0.000 claims abstract description 28
- 238000001035 drying Methods 0.000 claims abstract description 21
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 16
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 16
- 239000011258 core-shell material Substances 0.000 claims abstract description 16
- 239000002904 solvent Substances 0.000 claims abstract description 9
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 66
- 230000008569 process Effects 0.000 claims description 52
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 44
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 39
- 239000000243 solution Substances 0.000 claims description 39
- 239000002994 raw material Substances 0.000 claims description 36
- 239000002245 particle Substances 0.000 claims description 21
- 239000007864 aqueous solution Substances 0.000 claims description 15
- 239000011347 resin Substances 0.000 claims description 10
- 229920005989 resin Polymers 0.000 claims description 10
- 239000007921 spray Substances 0.000 claims description 9
- RGSFGYAAUTVSQA-UHFFFAOYSA-N Cyclopentane Chemical compound C1CCCC1 RGSFGYAAUTVSQA-UHFFFAOYSA-N 0.000 claims description 6
- 239000004088 foaming agent Substances 0.000 claims description 3
- DMEGYFMYUHOHGS-UHFFFAOYSA-N heptamethylene Natural products C1CCCCCC1 DMEGYFMYUHOHGS-UHFFFAOYSA-N 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 abstract description 17
- 238000001125 extrusion Methods 0.000 abstract description 11
- 238000005469 granulation Methods 0.000 abstract description 8
- 230000003179 granulation Effects 0.000 abstract description 8
- 239000010410 layer Substances 0.000 abstract description 8
- 229960000892 attapulgite Drugs 0.000 abstract 11
- 229910052625 palygorskite Inorganic materials 0.000 abstract 11
- 239000012792 core layer Substances 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 23
- 238000006243 chemical reaction Methods 0.000 description 15
- 230000000694 effects Effects 0.000 description 14
- 230000009471 action Effects 0.000 description 9
- 150000003254 radicals Chemical class 0.000 description 9
- 238000000465 moulding Methods 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- 238000002425 crystallisation Methods 0.000 description 6
- 230000008025 crystallization Effects 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 6
- 239000006261 foam material Substances 0.000 description 6
- 238000006482 condensation reaction Methods 0.000 description 5
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000004132 cross linking Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 5
- 239000003365 glass fiber Substances 0.000 description 5
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 5
- 239000000155 melt Substances 0.000 description 5
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 5
- 239000002073 nanorod Substances 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 239000002344 surface layer Substances 0.000 description 5
- 230000007704 transition Effects 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- 230000007062 hydrolysis Effects 0.000 description 4
- 238000006460 hydrolysis reaction Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000036632 reaction speed Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000012752 auxiliary agent Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
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- 230000004048 modification Effects 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
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- 229920006351 engineering plastic Polymers 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012764 mineral filler Substances 0.000 description 1
- 230000000877 morphologic effect Effects 0.000 description 1
- 239000002667 nucleating agent Substances 0.000 description 1
- 239000002984 plastic foam Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 239000004616 structural foam Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F279/00—Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as defined in group C08F36/00
- C08F279/02—Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as defined in group C08F36/00 on to polymers of conjugated dienes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
- C08J9/122—Hydrogen, oxygen, CO2, nitrogen or noble gases
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
- C08J9/14—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
- C08J9/141—Hydrocarbons
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- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/02—CO2-releasing, e.g. NaHCO3 and citric acid
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- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/14—Saturated hydrocarbons, e.g. butane; Unspecified hydrocarbons
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- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
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- C08J2451/00—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
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- C08J2477/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
- C08J2477/02—Polyamides derived from omega-amino carboxylic acids or from lactams thereof
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Abstract
The application provides a SEBS/AT composite toughening agent and a preparation method thereof, and a high-performance PET/PA6 foaming material, wherein the preparation method of the SEBS/AT composite toughening agent specifically comprises the following steps: drying and dispersing Attapulgite (AT) in a stirring state to a nano state, continuously stirring, adding a coupling agent solution into the dried AT, uniformly mixing the coupling agent solution with the AT for coupling reaction, drying a product to remove a solvent to obtain nano-scale active AT, uniformly mixing SEBS, the active AT, an initiator and an antioxidant, putting the mixture into a single-screw extruder for extrusion granulation to obtain the SEBS/AT composite toughening agent with a core-shell mechanism, wherein a core layer is the active AT, a middle layer is the coupling agent, and a shell layer is the SEBS and has a multilayer structure; the SEBS/AT composite toughening agent prepared by the method is added into the PET/PA6 foaming material, so that the foaming material can be toughened, the rigidity of the material is prevented from being reduced, and the PET/PA6 foaming material with high rigidity and high toughness is prepared.
Description
Technical Field
The application belongs to the technical field of foaming materials, and particularly relates to a SEBS/AT composite toughening agent, a preparation method thereof and a high-performance PET/PA6 foaming material.
Background
The PET foam material is a typical structural foam material, has the highest strength in common plastic foam products under the same condition, has good heat resistance, fatigue resistance and Young modulus, can be recycled, and has good environmental protection performance; however, the PET foam material has serious defects of poor impact resistance, low temperature resistance, low elongation at break and serious post crystallization phenomenon, and particularly thick products (such as plates) are easy to warp, so that the application of the PET foam material to some structural parts is limited.
PA6 is an important thermoplastic engineering plastic, which has high crystallization speed and excellent mechanical properties, but is sensitive to temperature and moisture, and the mechanical properties of the PA6 are reduced along with the increase of temperature and humidity, and meanwhile, the stability of the PA6 is affected, so that the PA6 is limited in application in various fields.
In the prior art, the PET and the PA6 are blended, so that the application defects of the PET and the PA6 are overcome, and the composite material with higher chemical stability, thermal stability, strength and processability is obtained, but the PET and the PA6 are an incompatible crystal/crystal blending system, the compatibility is poor, a compatilizer is required to be added, and meanwhile, in order to prevent the material from warping in the process of processing and forming, the toughness of the material is improved by adding the toughening agent into the system.
The Chinese patent application No. CN201110347339.5 discloses a high-toughness low-warpage low-modulus-temperature glass fiber reinforced PET/PA6 alloy and a preparation method thereof, wherein the PET/PA6 alloy comprises PET, PA6, a toughening agent, mineral filler, glass fiber, a compatilizer, a composite nucleating agent, a coupling agent and an antioxidant. By adding the compatilizer, the toughening agent and the glass fiber, the material has higher stability, higher impact strength and higher heat distortion temperature, and simultaneously, the warping of the material is reduced; however, more glass fibers and auxiliary agents are added in the scheme, so that the components cannot be fully and uniformly mixed, and meanwhile, the glass fibers and the inorganic powder can generate serious interference to the foaming process, so that the foam holes become large, serious hole merging and perforation phenomena occur, and further, the uniformity and uniformity of the performance and the overall performance of the formed material are rapidly reduced.
The present application has been made in view of this.
Disclosure of Invention
One of the purposes of the application is to provide a SEBS/AT composite toughening agent which has a core-shell structure with active AT as a core and SEBS as a shell aiming AT the defects of the prior art.
The application further aims to overcome the defects of the prior art, and provides a preparation method of the SEBS/AT composite toughening agent, which is characterized in that after the AT is subjected to surface active treatment, the active AT and the SEBS are mixed and added with a coupling agent, and the mixture is compounded to form the composite toughening agent with a core-shell structure.
The application also aims to provide a high-performance PET/PA6 foaming material which aims AT overcoming the defects of the prior art, and the SEBS/AT composite toughening agent is used for improving the crystallization rate of the material, reducing the warping property and ensuring that the material has better stability and consistency.
In order to solve the problems in the prior art, the first aspect of the application provides a SEBS/AT composite toughening agent, which has a core-shell structure formed by taking active AT as a core and SEBS as a shell, wherein the ratio of the particle size of the SEBS/AT composite toughening agent to the particle size of the active AT is 1000:3-1000:11.
The particle size ratio in the scheme is a preferable ratio range obtained by technicians on the basis of a large number of experiments, because active AT can be depolymerized to form a nano-state rod body in the preparation process of the SEBS/AT composite toughening agent, the SEBS is coated on the nano-state active AT surface to obtain the SEBS/AT composite toughening agent, the particle size of the SEBS/AT composite toughening agent can be controlled in a preferable range more stably, and if the ratio is more than 1000:11, the particle size of the toughening agent is possibly smaller, and the toughening effect on the composite material is not obvious; if the ratio is less than 1000:3, the particle size of the toughening agent is possibly overlarge, more toughening agent is needed to be added to achieve the same toughening effect, the production cost is increased, and meanwhile, the rigidity of the material is reduced.
Further, in the SEBS/AT composite toughening agent, the particle size of the active AT serving as a core structure is 90-110 nm.
Further, the SEBS/AT composite toughening agent is prepared from the following raw materials in proportion:
SEBS：50％-80％；
active AT:19.7% -49.7%;
and (3) an initiator: 0.01 to 0.05 per mill;
an antioxidant: 0.2% -0.3%;
and uniformly mixing the raw materials, and extruding and granulating to obtain the SEBS/AT composite toughening agent.
In the scheme, the methoxy group of the silane coupling agent KH570 is subjected to condensation reaction with the hydroxyl on the surface of the AT to realize coupling, under the action of an initiator DCP, double bonds of the silane coupling agent can form free radicals to undergo grafting reaction with SEBS, and the SEBS is a nonpolar substance and is preferentially gathered on the surface of the AT with strong polarity and the surface combined with the KH570 by the chemical bond, so that the SEBS with a tough surface layer and the AT with a rigid core are finally formed, and the transition layer is a core-shell structure toughening system of the silane coupling agent.
Preferably, the SEBS/AT composite toughening agent comprises the following raw materials in a preferable proportion:
SEBS：65％-70％；
active AT:29.7% -34.7%;
and (3) an initiator: 0.01 to 0.03 per mill;
an antioxidant: 0.2% -0.3%.
Further, the initiator in the scheme is DCP; the antioxidant is B225.
In the scheme, the usage amount of the initiator is the usage amount range obtained by technicians on the basis of a large number of experiments, when the usage amount of the initiator exceeds 0.05 per mill, gel is easy to generate in the reaction process, the toughening efficiency of the composite toughening agent is influenced, and if the usage amount of the initiator is lower than 0.01 per mill, the grafting rate is influenced, so that the yield of the composite toughening agent with a core-shell structure is reduced, and the toughening effect is influenced.
The second aspect of the application provides a preparation method of SEBS/AT composite toughening agent, comprising the following steps:
s1, preparing active AT;
s2, preparing the SEBS/AT composite toughening agent with the core-shell structure by taking the active AT as a core and the SEBS as a shell.
Further, in step S1, the AT is subjected to a drying process, a depolymerization process, a mixing process of mixing with a coupling agent, a coupling reaction process, and a solvent removal process to obtain the active AT.
Further, the drying process is as follows: AT the temperature of 80-100 ℃ and stirring for 30-60min AT a first stirring speed;
the first stirring speed is 3000-4000rpm.
Further, the AT AT the time of proceeding to step S1 has a particle diameter of 2 to 8 μm and an aspect ratio of 15 to 30.
The temperature and the first stirring speed in the drying process are preferable parameters obtained by technicians on the basis of a large number of experiments, and the AT can be dried in a short time by stirring AT 80-100 ℃ and the stirring speed of 3000-4000rpm.
Further, the drying process also comprises a depolymerization process of AT, and more than 90% of AT is depolymerized in the depolymerization process to form the nano rod with the diameter of 90-110nm and the length-diameter ratio of more than 80.
In the process, the nanorods obtained by depolymerization are used as cores of the SEBS/AT composite toughening agent, so that the particle size of the SEBS/AT composite toughening agent can be accurately controlled, and the phenomenon that the toughening effect is not obvious due to the overlarge diameter of the SEBS/AT composite toughening agent or the increase of the adding amount of the toughening agent when the same toughening effect is achieved due to the overlarge diameter is avoided, and further the cost is increased.
Further, the drying process is ended when the AT is dried to a fluffy state, and the mixing process is entered.
In the scheme, the AT in the fluffy state has lower density, can be more easily mixed with the coupling agent, and improves the mixing uniformity and the coupling reaction rate of the coupling agent and the AT.
Further, the mixing process is as follows: spraying the coupling agent solution in the form of a spray into the AT while stirring AT a second stirring speed;
the second stirring speed is 500-600rpm.
The second stirring speed in the scheme is a preferable parameter obtained by a technician on the basis of a large number of experiments, under the stirring speed of 500-600rpm, the coupling agent can be fully mixed with the AT, meanwhile, the coupling agent is prepared into a solution, the solution is sprayed into the AT to be fully mixed with the AT in a spraying mode, the weight of the atomized coupling agent solution is smaller, the coupling agent solution can be uniformly adhered to the AT, and the mixing uniformity of the AT and the coupling agent is further improved.
Preferably, the coupling agent solution is sprayed into the AT in three passes.
In the above preferred scheme, the atomized coupling agent solution has smaller mass, and can not be uniformly mixed with the AT AT the bottom layer under the stirring state, and the coupling agent solution is sprayed into the AT for three times while stirring, so that the coupling agent and the AT are more rapidly and uniformly mixed, and the mixing efficiency is improved.
Further, the addition amount of the coupling agent solution is 6-8% of the AT mass.
Further, the coupling agent solution includes:
a silane coupling agent;
ethanol;
acetic acid aqueous solution;
the volume ratio of the silane coupling agent to the ethanol is 1:5-8;
the concentration of the aqueous acetic acid solution is 10%; the addition mass of the acetic acid aqueous solution is 3-15% of the mass of the ethanol solution of the silane coupling agent.
Further, the silane coupling agent is KH570.
In the scheme, the silane coupling agent can be dissolved in an aqueous solution of ethanol, and acetic acid is added to adjust the pH value of the system to make the system weak acid, so that the hydrolysis of the coupling agent is accelerated, and the coupling reaction speed of the coupling agent and the surface of the powder is improved; KH570 is selected because it contains unsaturated double bond in its molecular structure, and can generate free radical under the action of initiator to make cross-linking reaction with unsaturated bond in SEBS.
Further, the coupling reaction process is as follows: continuously stirring the mixture of the AT and the coupling agent AT a third stirring speed for 10-30min;
the third stirring speed is 1200-2200rpm.
In the above reaction, the third stirring speed is a preferable stirring speed obtained by a technician on the basis of a large number of experiments, and the coupling reaction can be performed more rapidly at the above stirring speed, so that the conventional coupling reaction usually takes a long time, and the time of the coupling reaction is greatly shortened by controlling the stirring speed.
Further, the solvent removal process comprises the following steps: drying the mixture after the coupling reaction process AT 80-100 ℃ for 1-2h to obtain the active AT.
Further, in the step S2, the SEBS/AT composite toughening agent comprises the following raw materials in proportion:
SEBS：50％-80％；
active AT:19.7% -49.7%;
and (3) an initiator: 0.01 to 0.05 per mill;
an antioxidant: 0.2% -0.3%;
and uniformly mixing the raw materials, and extruding and granulating to obtain the SEBS/AT composite toughening agent.
Further, the preparation process of the SEBS/AT composite toughening agent specifically comprises the following steps:
metering and uniformly mixing the raw materials of the SEBS/AT composite toughening agent, and then putting the mixture into an extruder for extrusion granulation;
the temperature parameters of the extruder during the above process are as follows:
| charging section | Mixing section | Metering section | Machine head |
| 100～120℃ | 160～180℃ | 180～190℃ | 160～170℃ |
The third aspect of the application also provides a high-performance PET/PA6 foaming material, which comprises the following raw materials in proportion:
PET：60％-70％；
PA6：20％-30％；
SEBS/AT composite toughening agent: 5% -8%;
SEBS-g-MA：1％-3％。
further, the raw materials are mixed and extruded to obtain a toughened PET/PA6 resin material, the toughened PET/PA6 resin material is foamed to obtain the high-performance PET/PA6 foaming material, and the foaming agent used in the foaming process is liquid CO 2 And cyclopentane.
Further, the high-performance PET/PA6 foaming material also comprises,
and (3) a compatibilizer: 0.5% -1.5%.
Further, the compatibilizer is MDI.
In the scheme, the compatibilizer can also perform chain extension reaction with PET and PA6 while improving the compatibility of the PET and the PA6, so that the melt strength of the resin material is further improved.
Further, the specific process for preparing the toughened PET/PA6 resin material comprises the following steps:
after metering, uniformly mixing all the raw materials, and then feeding the raw materials into a double-screw extruder for extrusion and granulation to obtain the material, wherein the temperature of each temperature zone of the double-screw extruder is as follows:
further, the compatibilizer is fed into the extruder from the third zone.
The beneficial effects of the technical scheme are as follows:
the SEBS and the active AT are compounded to prepare the composite toughening agent with the core-shell structure, so that the crystallization rate of the PET/PA6 foaming material can be effectively improved, the warping property during molding is reduced, and the stability and consistency of the material are improved; the AT is dried AT the first stirring speed, so that the AT can be fully dried in a short time, the AT is dried to be in a fluffy state, and the AT and the coupling agent can be well and uniformly mixed; the coupling agent is added into the AT for three times in a spray mode AT the second stirring speed, so that the AT and the coupling agent are mixed more uniformly, the mixing time is reduced, and the mixing efficiency is improved; the third stirring speed can improve the speed of coupling reaction between AT and the coupling agent, and improve the preparation efficiency of SEBS/AT composite toughening agent; using a silane coupling agent KH570 as a coupling agent, wherein unsaturated double bonds on KH570 can generate a crosslinking reaction with unsaturated bonds on SEBS forming a shell structure, so as to form the SEBS/AT composite toughening agent with a core-shell structure; in the process of preparing the SEBS/AT composite toughening agent, the use amount of the initiator is in a use amount range obtained by technicians on the basis of a large number of experiments, and when the use amount of the initiator is not in the range, the production efficiency and the toughening effect of the produced composite toughening agent are reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. It is evident that the drawings in the following description are only examples, from which other drawings can be obtained by a person skilled in the art without the inventive effort.
FIG. 1 is a flow chart of the preparation of active AT in the SEBS/AT composite toughening agent.
FIG. 2 is a flow chart of the preparation of the high-performance PET/PA6 foam material.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be clearly and completely described with reference to some examples, and it should be understood by those skilled in the art that the following embodiments are only for explaining the technical principles of the present application and are not intended to limit the scope of the present application. For example, although the present application describes the steps of the method of the present application in a particular order, these orders are not limiting and one skilled in the art may perform the steps in a different order without departing from the basic principles of the present application.
The application discloses a preparation method of SEBS/AT composite toughening agent, comprising the following steps:
s1, preparing active AT;
s2, preparing the SEBS/AT composite toughening agent by taking the active AT prepared in the step S1 as a raw material.
By taking active AT as a core and SEBS as a shell, the SEBS/AT composite toughening agent with a core-shell structure is formed, so that the crystallization rate of PET can be effectively improved, the stability and consistency of the PET/PA6 foaming material are improved, and the warping property of the material is reduced.
Example 1
As an embodiment of the application, the embodiment provides a SEBS/AT composite toughening agent, which comprises the following raw materials in proportion:
SEBS：50％；
active AT:49.7%;
and (3) an initiator: 0.01%;
an antioxidant: 0.3%;
the initiator is DCP, and the antioxidant is B225;
the ratio of the particle size of the prepared SEBS/AT composite toughening agent to the particle size of the active AT is 1000:7.
Further, the diameter of the radial direction of the single active AT is about 110nm, the diameter of the core formed by AT recombination is about 35 mu m, and the diameter of the SEBS/AT composite toughening agent is 200 mu m, namely the active AT can be agglomerated due to the existence of huge surface energy in the process of forming hard cores, and the following examples will not be described.
In the scheme, the methoxy group of the silane coupling agent KH570 is subjected to condensation reaction with the hydroxyl on the surface of the AT to realize coupling, under the action of an initiator DCP, double bonds of the silane coupling agent can form free radicals to undergo grafting reaction with SEBS, and the SEBS is a nonpolar substance and is preferentially gathered on the surface of the AT with strong polarity and the surface combined with the KH570 by the chemical bond, so that the SEBS with a tough surface layer and the AT with a rigid core are finally formed, and the transition layer is a core-shell structure toughening system of the silane coupling agent.
The preparation method of the SEBS/AT composite toughening agent comprises the following steps:
s1, preparing active AT;
s2, preparing SEBS/AT composite toughening agent by taking the active AT prepared in the step S1 as a raw material;
in the embodiment, the AT is subjected to a drying process, a mixing process of mixing with a coupling agent, a coupling reaction process and a solvent removal process to obtain active AT, then the active AT is mixed with SEBS and added with an initiator, and the SEBS/AT composite toughening agent is obtained by extrusion granulation through an extruder.
Further, the coupling agent is added in an amount of 6% by mass of the AT.
Further, the steps for preparing active AT are specifically as follows:
and (3) drying: the AT was stirred AT a first stirring speed of 3000rpm in this example AT 100deg.C for 60 minutes until the AT dried to a fluffy state.
The AT can be dried AT a stirring speed of 3000rpm to remove water in the AT more quickly, and the AT dried to a fluffy state can be better mixed with the coupling agent, so that the mixing effect is improved.
Mixing: the coupling agent solution was sprayed in three times into the AT in the form of spray with stirring AT a second stirring speed of 500rpm for mixing.
Further, the drying process also comprises a depolymerization process of AT, wherein in the depolymerization process, 90% or more of AT with the particle size of 2-8 mu m and the length-diameter ratio of 15-30 is depolymerized to form the nanorods with the diameter of 90-110nm and the length-diameter ratio of 80 or more.
Further, in the above mixing process, the coupling agent solution includes,
a silane coupling agent;
ethanol;
acetic acid aqueous solution;
the volume ratio of the silane coupling agent to the ethanol is 1:8, 8;
the concentration of the aqueous acetic acid solution is 10%; the addition mass of the acetic acid aqueous solution is 3% of the mass of the ethanol solution of the silane coupling agent.
The silane coupling agent can be dissolved in an aqueous solution of ethanol, and acetic acid is added to adjust the pH value of the system to make the system weak acid, so that the hydrolysis of the coupling agent is quickened, and the coupling reaction speed of the coupling agent and the surface of the powder is improved.
The coupling agent is added into the AT in a spray mode for three times, the mixture is stirred AT the stirring speed of 500rpm, the AT which is not sprayed to the coupling agent is turned up while the coupling agent which is added into the AT is mixed with the AT by stirring, and the coupling agent is sprayed again, so that the mixing uniformity is further improved, and the full mixing of the AT and the coupling agent is realized by the scheme.
The coupling reaction process comprises the following steps: the mixture of AT and coupling agent was continuously stirred AT a third stirring speed of 1800rpm for 30 minutes.
The solvent removal process comprises the following steps: drying the mixture after the coupling reaction process AT 100 ℃ for 2 hours until the taste of the ethanol cannot be smelled in the mixture, thereby obtaining the active AT.
Furthermore, the reason why KH570 is selected as the coupling agent is that KH570 contains unsaturated double bond in the molecular structure of KH570, and can generate free radical under the action of initiator to generate crosslinking reaction with unsaturated bond in toughening agent SEBS.
In step S2, the above raw materials are metered and mixed uniformly, and then added into a single screw extruder for extrusion granulation, and the extruder temperature section parameters are as follows:
| charging section | Mixing section | Metering section | Machine head |
| 120℃ | 160℃ | 190℃ | 160℃ |
In the extrusion process, the methoxy group of the silane coupling agent KH570 is subjected to condensation reaction with the hydroxyl on the surface of the AT to realize coupling, under the action of an initiator DCP, double bonds of the silane coupling agent KH570 can form free radicals to undergo grafting reaction with SEBS, and because SEBS is a nonpolar substance and is preferentially gathered on the surface of the AT with strong polarity, the SEBS with a tough surface layer and the AT with a rigid core are finally formed, and the transition layer is a core-shell structure toughening system of the silane coupling agent.
Example two
As another embodiment of the present application, this embodiment provides a SEBS/AT composite toughening agent, which comprises the following raw materials in proportion:
SEBS：80％；
active AT:19.8%;
and (3) an initiator: 0.05%o;
an antioxidant: 0.2%;
the initiator is DCP, and the antioxidant is B225;
the ratio of the particle size of the prepared SEBS/AT composite toughening agent to the particle size of the active AT is 1000:11.
Further, the diameter of the active AT in the radial direction is 90nm, and the diameter of the prepared SEBS/AT composite toughening agent is 300 mu m.
The preparation method of the SEBS/AT composite toughening agent is the same as that of the first embodiment, except that in the embodiment, the addition amount of the coupling agent solution is 8% of the AT mass.
The preparation of active AT comprises the following steps:
and (3) drying: the AT was stirred AT 80℃for 60 minutes AT a first stirring speed, which in this example was 4000rpm, until the AT dried to a fluffy state.
The AT can be dried AT the stirring speed of 2200rpm to remove water in the AT more quickly, and the AT dried to a fluffy state can be better mixed with the coupling agent, so that the mixing effect is improved.
Mixing: the coupling agent solution was sprayed in three times into the AT in the form of spray with stirring AT a second stirring speed of 600rpm for mixing.
Further, the drying process also comprises a depolymerization process of AT, wherein in the depolymerization process, 90% or more of AT with the particle size of 2-8 mu m and the length-diameter ratio of 15-30 is depolymerized to form the nanorods with the diameter of 90-110nm and the length-diameter ratio of 80 or more.
Further, in the above mixing process, the coupling agent solution includes,
a silane coupling agent;
ethanol;
acetic acid aqueous solution;
the volume ratio of the silane coupling agent to the ethanol is 1:5, a step of;
the concentration of the aqueous acetic acid solution is 10%; the addition mass of the acetic acid aqueous solution is 15% of the mass of the ethanol solution of the silane coupling agent.
The silane coupling agent can be dissolved in an aqueous solution of ethanol, and acetic acid is added to adjust the pH value of the system to make the system weak acid, so that the hydrolysis of the coupling agent is quickened, and the coupling reaction speed of the coupling agent and the surface of the powder is improved.
The coupling agent is added into the AT in a spray mode for three times, the mixture is stirred AT the stirring speed of 600rpm, the AT which is not sprayed to the coupling agent is turned up while the coupling agent which is already added into the AT is mixed with the AT by stirring, and the coupling agent is sprayed again, so that the uniformity of mixing is further improved, and the full mixing of the AT and the coupling agent is realized through the scheme.
The coupling reaction process comprises the following steps: the mixture of AT and coupling agent was continuously stirred AT a third stirring speed of 2200rpm for 30 minutes.
The solvent removal process comprises the following steps: drying the mixture after the coupling reaction process AT 80 ℃ for 1h until the taste of ethanol cannot be smelled in the mixture, thereby obtaining the active AT.
Furthermore, the reason why KH570 is selected as the coupling agent is that KH570 contains unsaturated double bond in the molecular structure of KH570, and can generate free radical under the action of initiator to generate crosslinking reaction with unsaturated bond in toughening agent SEBS.
Further, the raw materials are added into a single screw extruder for extrusion granulation after being metered and mixed uniformly, and the parameters of the temperature section of the extruder are as follows:
| charging section | Mixing section | Metering section | Machine head |
| 120℃ | 160℃ | 190℃ | 160℃ |
In the extrusion process, the methoxy group of the silane coupling agent KH570 is subjected to condensation reaction with the hydroxyl on the surface of the AT to realize coupling, under the action of an initiator DCP, double bonds of the silane coupling agent KH570 can form free radicals to undergo grafting reaction with SEBS, and because SEBS is a nonpolar substance and is preferentially gathered on the surface of the AT with strong polarity, the SEBS with a tough surface layer and the AT with a rigid core are finally formed, and the transition layer is a core-shell structure toughening system of the silane coupling agent.
Example III
As another embodiment of the present application, this embodiment provides a SEBS/AT composite toughening agent, which comprises the following raw materials in proportion:
SEBS：65％；
active AT:34.7%;
and (3) an initiator: 0.03 per mill;
an antioxidant: 0.3%;
the initiator is DCP, and the antioxidant is B225;
the ratio of the particle size of the prepared SEBS/AT composite toughening agent to the particle size of the active AT is 1000:3.
Further, the diameter of the active AT in the radial direction is 100nm, and the diameter of the prepared SEBS/AT composite toughening agent is 220 mu m.
The preparation method of the SEBS/AT composite toughening agent is the same as that of the first embodiment, except that in the present embodiment, the addition amount of the coupling agent solution is 7% of the AT mass.
The preparation of active AT comprises the following steps:
and (3) drying: the AT was stirred AT 90℃for 50 minutes AT a first stirring speed, which in this example was 4000rpm, until the AT dried to a fluffy state.
The AT can be dried AT the stirring speed of 4000rpm to remove water in the AT more quickly, and the AT dried to a fluffy state can be better mixed with the coupling agent, so that the mixing effect is improved.
Mixing: the coupling agent solution was sprayed in three times into the AT in the form of spray with stirring AT a second stirring speed of 550rpm for mixing.
Further, the drying process also comprises a depolymerization process of AT, wherein in the depolymerization process, 90% or more of AT with the particle size of 2-8 mu m and the length-diameter ratio of 15-30 is depolymerized to form the nanorods with the diameter of 90-110nm and the length-diameter ratio of 80 or more.
Further, in the above mixing process, the coupling agent solution includes,
a silane coupling agent;
ethanol;
acetic acid aqueous solution;
the volume ratio of the silane coupling agent to the ethanol is 1:7, preparing a base material;
the concentration of the aqueous acetic acid solution is 10%; the addition mass of the acetic acid aqueous solution is 9% of the mass of the ethanol solution of the silane coupling agent.
The silane coupling agent can be dissolved in an aqueous solution of ethanol, and acetic acid is added to adjust the pH value of the system to make the system weak acid, so that the hydrolysis of the coupling agent is quickened, and the coupling reaction speed of the coupling agent and the surface of the powder is improved.
The coupling agent is added into the AT in a spray mode for three times, and the mixture is stirred AT the stirring speed of 550rpm, and when the coupling agent which is added into the AT is mixed with the AT by stirring, part of the AT which is not sprayed to the coupling agent is turned up, and the coupling agent is sprayed again, so that the uniformity of mixing is further improved, and the full mixing of the AT and the coupling agent is realized through the scheme.
The coupling reaction process comprises the following steps: the mixture of AT and coupling agent was continuously stirred AT a third stirring speed of 2000rpm for 30 minutes.
The solvent removal process comprises the following steps: drying the mixture after the coupling reaction process AT 95 ℃ for 1.5 hours until the taste of the ethanol cannot be smelled in the mixture, thereby obtaining the active AT.
Furthermore, the reason why KH570 is selected as the coupling agent is that KH570 contains unsaturated double bond in the molecular structure of KH570, and can generate free radical under the action of initiator to generate crosslinking reaction with unsaturated bond in toughening agent SEBS.
Further, the raw materials are added into a single screw extruder for extrusion granulation after being metered and mixed uniformly, and the parameters of the temperature section of the extruder are as follows:
| charging section | Mixing section | Metering section | Machine head |
| 110℃ | 180℃ | 190℃ | 170℃ |
In the extrusion process, the methoxy group of the silane coupling agent KH570 is subjected to condensation reaction with the hydroxyl on the surface of the AT to realize coupling, under the action of an initiator DCP, double bonds of the silane coupling agent KH570 can form free radicals to undergo grafting reaction with SEBS, and because SEBS is a nonpolar substance and is preferentially gathered on the surface of the AT with strong polarity, the SEBS with a tough surface layer and the AT with a rigid core are finally formed, and the transition layer is a core-shell structure toughening system of the silane coupling agent.
Example IV
As another embodiment of the present application, the present embodiment provides a SEBS/AT composite toughening agent, wherein the raw material ratio and the preparation method are the same as those of the first embodiment, and the difference is that the coupling agent solution is an acetic acid aqueous solution of a silane coupling agent.
In this example, the concentration of the aqueous acetic acid solution was 10%; the amounts of the silane coupling agent and the aqueous acetic acid solution in the coupling agent solution were exactly the same as those in the first embodiment.
The application also provides a high-performance PET/PA6 foaming material, which uses the SEBS/AT composite toughening agent in the embodiment, and specifically comprises the following components:
example five
As another embodiment of the present application, this embodiment provides a high performance PET/PA6 foamed material, which is prepared by using the SEBS/AT composite toughening agent described in embodiment one as a raw material.
In this embodiment, the raw materials of the high performance PET/PA6 foaming material are as follows:
PET：60％；
PA6：30％；
SEBS/AT composite toughening agent: 8%;
SEBS-g-MA：1.5％；
and (3) a compatibilizer: 0.5%.
Further, the compatibilizer is MDI.
Further, the raw materials are mixed and extruded to obtain a toughened PET/PA6 resin material, the toughened PET/PA6 resin material is foamed to obtain the high-performance PET/PA6 foaming material, and the foaming agent used in the foaming process is liquid CO 2 And cyclopentane.
In the scheme, the compatibilizer MDI can be used for carrying out chain extension reaction with PET and PA6 while improving the compatibility of the PET and the PA6, so that the melt strength of the resin material is further improved.
Further, the specific process for preparing the toughened PET/PA6 resin material comprises the following steps:
after metering, uniformly mixing all the raw materials, and then feeding the raw materials into a double-screw extruder for extrusion and granulation to obtain the material, wherein the temperature of each temperature zone of the double-screw extruder is as follows:
further, the compatibilizer is fed into the extruder from the third zone.
Example six
As another embodiment of the present application, this embodiment provides a high performance PET/PA6 foamed material, which has the same preparation method as that of embodiment five, except that the SEBS/AT composite toughening agent described in embodiment two is used as a raw material.
Example seven
As another embodiment of the present application, this embodiment provides a high performance PET/PA6 foamed material, which has the same preparation method as that of embodiment five, except that the SEBS/AT composite toughening agent described in embodiment three is used as a raw material.
Example eight
As another embodiment of the present application, this embodiment provides a high performance PET/PA6 foamed material, which has the same preparation method as that of embodiment five, except that the SEBS/AT composite toughening agent described in embodiment four is used as a raw material.
Example nine
As another embodiment of the present application, this embodiment provides a high-performance PET/PA6 foamed material having the same preparation method as that of embodiment five, except that in this embodiment, the raw material ratio of the high-performance PET/PA6 foamed material is as follows:
PET：70％；
PA6：20.5％；
SEBS/AT composite toughening agent: 5%;
SEBS-g-MA：3％；
and (3) a compatibilizer: 1.5%.
Examples ten
As another embodiment of the present application, this embodiment provides a high-performance PET/PA6 foamed material having the same preparation method as that of embodiment five, except that in this embodiment, the raw material ratio of the high-performance PET/PA6 foamed material is as follows:
PET：69％；
PA6：20％；
SEBS/AT composite toughening agent: 8%;
SEBS-g-MA：2％；
and (3) a compatibilizer: 1%.
Example eleven
As another embodiment of the present application, this embodiment provides a high-performance PET/PA6 foamed material having the same preparation method as that of embodiment five, except that in this embodiment, the raw material ratio of the high-performance PET/PA6 foamed material is as follows:
PET：60.5％；
PA6：30％；
SEBS/AT composite toughening agent: 8%;
SEBS-g-MA：1.5％。
comparative example one
This comparative example provides a PET foam material without the addition of PA6, toughening agent and compatibilizer.
Comparative example two
This comparative example provides a PA6 foam material without the addition of PET, toughening agent and compatibilizer.
Comparative example three
The comparative example provides a PET/PA6 foamed material, wherein the proportion of PET and PA6 mass components is 7:3, no other auxiliary agent is added.
Comparative example four
The comparative example provides a PET/PA6 foaming material, the preparation method is the same as that of the fourth example, and the raw materials are as follows:
PET：62％；
PA6：30％；
SEBS/AT composite toughening agent: 8%.
Comparative example five
The comparative example provides a SEBS/AT composite toughening agent, and the preparation method is the same as that of the first example, and the difference is that the raw materials are proportioned as follows:
SEBS：86％；
active AT:13.7%;
and (3) an initiator: 0.05%o;
an antioxidant: 0.3%.
The prepared SEBS/AT composite toughening agent is prepared into the PET/PA6 foaming material in the same proportion and preparation method as in the fifth embodiment.
Comparative example six
The comparative example provides a SEBS/AT composite toughening agent, and the preparation method is the same as that of the first example, and the difference is that the raw materials are proportioned as follows:
SEBS：44％；
active AT:55.8%;
and (3) an initiator: 0.05%o;
an antioxidant: 0.2%.
The prepared SEBS/AT composite toughening agent is prepared into the PET/PA6 foaming material in the same proportion and preparation method as in the fifth embodiment.
Experimental example 1
The purpose of the experimental example is to compare the toughening effect of SEBS/AT composite toughening agent obtained by different preparation methods on PET/PA6 foaming materials, and the comparison result is shown in the following table:
in the above results, the SEBS/AT composite toughening agent described in the fourth embodiment is used for toughening the PET/PA6 foamed material in the eighth embodiment, the SEBS/AT composite toughening agent described in the first embodiment is used for toughening the PET/PA6 foamed material in the fifth embodiment, and as can be seen from the comparison result, the PET/PA6 foamed material prepared in the fifth embodiment has a tough tensile strength of 44MPa, a bending strength of 51MPa and a notched impact strength of 15.1KJ/m 2 While the PET/PA6 foamed material prepared in example eight had a tensile strength of 51MPa, a flexural strength of 62MPa, and a notched impact strength of 20.7KJ/m 2 The tensile strength, bending strength and notch impact strength of the PET/PA6 foaming material prepared in the fifth embodiment are obviously higher than those of the PET/PA6 foaming material prepared in the eighth embodiment, which indicates that better toughening effect can be obtained by toughening the PET/PA6 foaming material by using the SEBS/AT composite toughening agent in the first embodiment.
Secondly, as can be seen from the comparison result, the molding shrinkage of the PET/PA6 foamed material prepared in the fifth embodiment is 1.51%, while the molding shrinkage of the PET/PA6 foamed material prepared in the eighth embodiment is 1.69%, which is significantly higher than that of the fifth embodiment, which indicates that the use of the SEBS/AT composite toughening agent in the first embodiment for toughening the PET/PA6 foamed material can significantly reduce the warpage property of the material. Can obtain better toughening effect
Experimental example two
The purpose of this experimental example is to test the mechanical properties of PET/PA6 foamed materials without using toughening agents, and PET/PA6 foamed materials with different toughening agents, and the comparison results are shown in the following table:
the test results were as follows:
from the results, the high-performance PET/PA6 foaming materials prepared by using the SEBS/AT composite toughening agent in the fifth and tenth embodiments have obviously improved notch impact strength and melt strength compared with those of the first, second, third and fourth embodiments, and meanwhile, the molding shrinkage is obviously reduced, which indicates that the high-performance PET/PA6 foaming materials prepared by using the SEBS/AT composite toughening agent have better mechanical properties, higher stability, lower warping property and obvious toughening effect.
Secondly, in the fourth comparative example, the SEBS/AT composite toughening agent disclosed by the application is used for preparing the PET/PA6 foaming material, the third comparative example only uses PET and PA6 for preparing the PET/PA6 foaming material in a composite manner, and the notch impact strength of the PET/PA6 foaming material prepared in the third comparative example is 8.7KJ/m 2 Melt strength was 2.56mN; whereas the foam prepared in comparative example IV had a notched impact strength of 12.7KJ/m 2 The melt strength was 12.5mN; from the comparison results of the third comparative example and the fourth comparative example, the SEBS/AT composite toughening agent has remarkable toughening effect on PET/PA6 foaming materials, and can remarkably improve the toughness of the materials.
Meanwhile, it can also be found from the comparison of the third comparative example and the fourth comparative example that the molding shrinkage of the PET/PA6 foamed material prepared in the third comparative example is 2.23%; and the molding shrinkage of the foaming material prepared in the comparative example IV was 2.10%; the shrinkage rate of the PET/PA6 foaming material prepared by using the SEBS/AT composite toughening agent in the fourth comparative example is lower, and further the warping property of the material is lower, so that the dimensional stability and the morphological stability are correspondingly improved when the material is molded by a die.
Further, as can be seen from the comparison of the data of the fifth embodiment and the tenth embodiment, the performance of the high-performance PET/PA6 foaming material added with the compatibilizer in the fifth embodiment is improved, wherein the improvement of the notch impact strength, the melt strength and the molding shrinkage rate is most obvious, which indicates that the compatibility of PET and PA6 is obviously improved when MDI is used as the compatibilizer, and the uniformity of the system is improved; meanwhile, MDI can also carry out chain extension reaction with PET and PA6, so that the melt strength of the system is greatly improved, the crystallization rate of PET is further improved, and the molding shrinkage rate of the material is reduced.
The foregoing description is only a preferred embodiment of the present application, and the present application is not limited to the above-mentioned embodiment, but is not limited to the above-mentioned embodiment, and any simple modification, equivalent change and modification made by the technical matter of the present application can be further combined or replaced by the equivalent embodiment without departing from the scope of the technical solution of the present application.
Claims (10)
1. The SEBS/AT composite toughening agent is characterized by having a core-shell structure formed by taking active AT as a core and SEBS as a shell, wherein the ratio of the particle size of the SEBS/AT composite toughening agent to the particle size of the active AT is 1000:3-1000:11;
the SEBS/AT composite toughening agent is prepared from the following raw materials in proportion:
SEBS：50%-80%；
active AT:19.7% -49.7%;
and (3) an initiator: 0.01 to 0.05 per mill;
an antioxidant: 0.2% -0.3%;
wherein, the active AT is prepared by the AT through a drying process, a mixing process of mixing with a coupling agent, a coupling reaction process and a solvent removal process;
the initiator is DCP, the antioxidant is B225, and the coupling agent is silane coupling agent KH570.
2. The SEBS/AT composite toughener of claim 1, wherein the particle size of the active AT as a core structure in the SEBS/AT composite toughener is 90-110 nm.
3. A method for preparing the SEBS/AT composite toughening agent according to claim 1 or 2, which comprises the following steps:
s1, preparing active AT;
s2, preparing the SEBS/AT composite toughening agent with the core-shell structure by taking the active AT as a core and the SEBS as a shell.
4. The method for preparing SEBS/AT composite toughener according to claim 3, wherein in the step S1, AT is subjected to a drying process, a mixing process of mixing with a coupling agent, a coupling reaction process and a solvent removal process to obtain the active AT.
5. The method for preparing the SEBS/AT composite toughener according to claim 4, wherein the drying process is as follows: AT the temperature of 80-100 ℃ and stirring for 30-60min AT a first stirring speed;
the first stirring speed is 3000-4000rpm.
6. The method for preparing the SEBS/AT composite toughener according to claim 4, wherein the mixing process is as follows: spraying the coupling agent solution in the form of a spray into the AT while stirring AT a second stirring speed;
the second stirring speed is 500-600rpm.
7. The method of claim 6, wherein the coupling agent solution is sprayed into the AT three times.
8. The preparation method of the SEBS/AT composite toughener according to claim 6, wherein the addition amount of the coupling agent solution is 6-8% of the AT mass;
the coupling agent solution includes:
a silane coupling agent;
ethanol;
acetic acid aqueous solution;
the volume ratio of the silane coupling agent to the ethanol is 1:5-8;
the concentration of the aqueous acetic acid solution is 10%; the addition mass of the acetic acid aqueous solution is 3-15% of the mass of the ethanol solution of the silane coupling agent.
9. The method for preparing the SEBS/AT composite toughener according to claim 4, wherein the coupling reaction process is as follows: continuously stirring at a third stirring speed for 10-30min;
the third stirring speed is 1800-2200rpm.
10. The high-performance PET/PA6 foaming material is characterized by comprising the following raw materials in proportion:
PET：60%-70%；
PA6：10%-30%；
SEBS/AT composite toughening agent: 5% -8%;
SEBS-g-MA：1%-3%；
wherein the SEBS/AT composite toughening agent is the SEBS/AT composite toughening agent as claimed in claim 1 or 2;
the raw materials are mixed and extruded to obtain a toughened PET/PA6 resin material, and the toughened PET/PA6 resin material is foamed to obtain the high-performance PET/PA6 foamed material;
the foaming agent used in the foaming process is liquid CO 2 And cyclopentane.
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