CN116333418A - High-rigidity polypropylene for cup and preparation method thereof - Google Patents
High-rigidity polypropylene for cup and preparation method thereof Download PDFInfo
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- CN116333418A CN116333418A CN202310321781.3A CN202310321781A CN116333418A CN 116333418 A CN116333418 A CN 116333418A CN 202310321781 A CN202310321781 A CN 202310321781A CN 116333418 A CN116333418 A CN 116333418A
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- -1 polypropylene Polymers 0.000 title claims abstract description 103
- 239000004743 Polypropylene Substances 0.000 title claims abstract description 87
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 85
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 238000010227 cup method (microbiological evaluation) Methods 0.000 title description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 72
- 239000000463 material Substances 0.000 claims abstract description 67
- 239000012784 inorganic fiber Substances 0.000 claims abstract description 35
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 35
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 33
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 33
- 239000011256 inorganic filler Substances 0.000 claims abstract description 25
- 229910003475 inorganic filler Inorganic materials 0.000 claims abstract description 25
- 239000004698 Polyethylene Substances 0.000 claims abstract description 18
- 229920000573 polyethylene Polymers 0.000 claims abstract description 18
- 238000006243 chemical reaction Methods 0.000 claims description 56
- 238000002156 mixing Methods 0.000 claims description 56
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 43
- 229910052710 silicon Inorganic materials 0.000 claims description 43
- 239000010703 silicon Substances 0.000 claims description 43
- 239000007822 coupling agent Substances 0.000 claims description 40
- 238000003756 stirring Methods 0.000 claims description 40
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 33
- 229960000892 attapulgite Drugs 0.000 claims description 32
- 229910052625 palygorskite Inorganic materials 0.000 claims description 32
- MTZQAGJQAFMTAQ-UHFFFAOYSA-N ethyl benzoate Chemical compound CCOC(=O)C1=CC=CC=C1 MTZQAGJQAFMTAQ-UHFFFAOYSA-N 0.000 claims description 30
- 238000001035 drying Methods 0.000 claims description 24
- 239000000203 mixture Substances 0.000 claims description 24
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical group [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 16
- 239000011268 mixed slurry Substances 0.000 claims description 16
- 230000001105 regulatory effect Effects 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 12
- 229920002748 Basalt fiber Polymers 0.000 claims description 8
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical group [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 8
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 8
- 238000001125 extrusion Methods 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 8
- 238000005469 granulation Methods 0.000 claims description 8
- 230000003179 granulation Effects 0.000 claims description 8
- 230000007935 neutral effect Effects 0.000 claims description 8
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical group OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 claims description 8
- 229920013716 polyethylene resin Polymers 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 8
- 229920005989 resin Polymers 0.000 claims description 8
- 239000011347 resin Substances 0.000 claims description 8
- 238000005406 washing Methods 0.000 claims description 8
- 238000005303 weighing Methods 0.000 claims description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 229920003023 plastic Polymers 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229910021487 silica fume Inorganic materials 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241001122767 Theaceae Species 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000012644 addition polymerization Methods 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- QKLCQKPAECHXCQ-UHFFFAOYSA-N ethyl phenylglyoxylate Chemical compound CCOC(=O)C(=O)C1=CC=CC=C1 QKLCQKPAECHXCQ-UHFFFAOYSA-N 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to the technical field of new materials, and discloses high-rigidity polypropylene for a cup and a preparation method thereof, wherein the high-rigidity polypropylene comprises the following components: polypropylene, modified doped silica micropowder, antioxidant, polyethylene, inorganic fiber and inorganic filler; the weight ratio of the modified doped silica micropowder to the inorganic fiber is 3:1; wherein the molecular weight of the polyethylene is 20000; the molecular weight of polypropylene is 5000; according to the invention, the polypropylene material is improved, so that the comprehensive performance, especially the mechanical performance, of the polypropylene material is improved greatly, and meanwhile, the rigidity performance of the polypropylene material is improved obviously, so that the obtained polypropylene material can be better suitable for use in a cup.
Description
Technical Field
The invention relates to the technical field of new materials, in particular to high-rigidity polypropylene for a cup and a preparation method thereof.
Background
Polypropylene, PP for short, is a polymer obtained by addition polymerization of propylene, and is a white wax-like material, transparent and light in appearance.
The cup is a vessel specially used for containing water. Its main function is to drink alcohol or tea, and its volume is not large. Or cup that was drunk in ancient times is called a lid bowl. The basic device is mostly straight or open, and the diameter of the opening edge is nearly equal to the height of the cup. Has flat bottom, foot ring or high foot. Archaeological data indicate that the earliest cups were found in the new stone age. The existence of the ceramic cup is seen in both Yangshao culture, longshan culture and Hemsy culture sites, and the cup type is most peculiar and diversified in this period: the ear-carrying cup is provided with a single ear or double ears, the foot-carrying cup is provided with a cone, a tripot cup, a Gu-shaped cup, a goblet cup and the like, and can be divided into a glass cup, a plastic cup, a ceramic cup, a wood cup and the like according to different manufacturing materials.
Because glass cup, ceramic cup are liable to collide with and break, be difficult to carry, therefore, the application of plastic cup is more and more extensive, and it is easier to carry, be difficult to collide with and break.
Initially, plastic cups were processed using polyvinyl chloride materials, which have excellent rigidity and can be applied to materials for cups, but they have a disadvantage in that harmful substances are generated after hot water is added, thus limiting their development and use.
The polypropylene material is nontoxic and harmless, and has wide application, but the polypropylene material is directly used for preparing the cup, has relatively poor rigidity, and cannot be applied to the cup material well.
Based on this, we propose a high rigidity polypropylene for cups, hopefully solving the disadvantages of the prior art.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the invention provides high-rigidity polypropylene for a cup and a preparation method thereof.
(II) technical scheme
In order to achieve the above purpose, the present invention provides the following technical solutions:
the high-rigidity polypropylene for the cup is prepared from the following components in parts by weight: 88-95 parts of polypropylene, 15-24 parts of modified doped silica micropowder, 1-4 parts of antioxidant, 4-6 parts of polyethylene, 0.5-0.8 part of inorganic fiber and 13-16 parts of inorganic filler;
the weight ratio of the modified doped silica micropowder to the inorganic fiber is 3:1;
wherein the molecular weight of the polyethylene is 20000;
the molecular weight of the polypropylene is 5000.
As a further technical scheme, the preparation method of the modified doped silicon micropowder comprises the following steps:
(1) Firstly, adding attapulgite into silicon micropowder, then simultaneously adding the attapulgite into a stirrer, and stirring for 30-40min to obtain a mixture;
(2) Adding the prepared mixture into a reaction kettle, adding ethanol into the reaction kettle, and stirring at a rotating speed of 500r/min for 30min to obtain mixed slurry;
(3) Regulating the temperature in the reaction kettle to 70-78 ℃, preserving heat for 15min, then adding a coupling agent and ethyl benzoate into the reaction kettle, firstly regulating the temperature to 88-90 ℃, preserving heat, stirring at a rotating speed of 150r/min for 30-40min, then reducing the temperature to 60-66 ℃, continuously preserving heat, stirring at a rotating speed of 200r/min for 1 h, and discharging to obtain a reaction material;
(4) And filtering the reaction material, washing the reaction material to be neutral, and then performing constant-temperature drying treatment to obtain the modified doped silicon micropowder.
As a further technical scheme, the mixing mass ratio of the silicon micro powder to the attapulgite in the step (1) is 12:1-2;
wherein the granularity of the silicon micropowder is 350 meshes;
the granularity of the attapulgite is 250 meshes.
As a further technical scheme: the mixing mass ratio of the mixture to the ethanol in the step (2) is 1:15-20.
As a further technical scheme, in the step (3), the mixing mass ratio of the coupling agent to the ethyl benzoate is 3:1-2;
the mixing mass ratio of the mixed slurry to the coupling agent is 10:1-1.5.
As a further technical scheme, the coupling agent is a titanate coupling agent.
As a further technical scheme: the constant temperature of the constant temperature drying treatment in the step (4) is 55-60 ℃;
the time for the constant temperature drying treatment was 4 hours.
As a further technical scheme: the antioxidant is phosphite antioxidant.
As a further technical scheme: the inorganic fibers are basalt fibers;
the inorganic filler is calcium carbonate.
A method for preparing high-rigidity polypropylene for a cup, comprising the following steps:
(1) Weighing the raw material components according to parts by weight respectively;
(2) Sequentially adding polypropylene resin, modified doped silica micropowder, antioxidant, polyethylene resin, inorganic fiber and inorganic filler into a high-speed mixer for mixing treatment, wherein the mixing stirring speed in the high-speed mixer is 2000r/min, and the mixing time is 10min, so as to obtain a uniformly mixed material;
(3) Adding the uniformly mixed materials into an extruder for melt extrusion granulation;
wherein the extruder used is a twin screw extruder.
Polypropylene is PP for short, and the chemical formula is (C 3 H 6 ) n, the density is 0.89-0.91 g/cm 3 Inflammable, melting point is 189 deg.C, 155 deg.CSoftening left and right, the service temperature is in the range of-30-140 ℃, and the corrosion resistance of acid, alkali, salt solution and various organic solvents can be realized under the temperature below 80 ℃, and the decomposition can be realized under the high temperature and oxidation effect. Polypropylene is a thermoplastic synthetic resin with excellent performance, is colorless semitransparent thermoplastic light general-purpose plastic, has chemical resistance, heat resistance, electrical insulation, high-strength mechanical property, good high-wear-resistance processing property and the like, and is widely applied to the production of fiber products such as clothing, blankets and the like, medical appliances, automobiles, bicycles, parts, conveying pipelines, chemical containers and the like, and is also used for food and medicine packaging.
In order to further improve the performance of the polypropylene material, the modified doped silica micropowder is introduced, and the combination of the modified doped silica micropowder and the inorganic fiber greatly improves the performance of the polypropylene material.
By introducing the modified doped silica micropowder, the modified doped silica micropowder can be tightly combined with a polypropylene macromolecular chain in the polypropylene material, and smaller gaps exist between the modified doped silica micropowder and the polypropylene matrix, so that the introduced modified silica micropowder has stronger bonding force between the surface of the modified silica micropowder and the polypropylene matrix, and the rigidity performance of the polypropylene material can be greatly improved through the stronger bonding force.
According to the invention, in the modification treatment process of the silicon micropowder, the active groups are connected to the surfaces of the silicon micropowder particles, so that the combination property between the silicon micropowder particles and the polypropylene material is greatly enhanced, the aggregation effect of the modified doped silicon micropowder can be effectively avoided, and the modified doped silicon micropowder can be more uniformly dispersed in a polypropylene material system, thereby improving the performance of polypropylene.
(III) beneficial effects
Compared with the prior art, the invention provides the high-rigidity polypropylene for the cup, which comprises the following components
The beneficial effects are that:
according to the invention, the polypropylene material is improved, so that the comprehensive performance, especially the mechanical performance, of the polypropylene material is improved greatly, and meanwhile, the rigidity performance of the polypropylene material is improved obviously, so that the obtained polypropylene material can be better suitable for use in a cup.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The following are specific examples:
example 1
The high-rigidity polypropylene for the cup is prepared from the following components in parts by weight: 88 parts of polypropylene, 15 parts of modified doped silica micropowder, 1 part of antioxidant, 4 parts of polyethylene, 0.5 part of inorganic fiber and 13 parts of inorganic filler;
the weight ratio of the modified doped silica micropowder to the inorganic fiber is 3:1;
wherein the molecular weight of the polyethylene is 20000;
the molecular weight of the polypropylene is 5000.
The preparation method of the modified doped silicon micropowder comprises the following steps:
(1) Firstly, adding attapulgite into silicon micropowder, then simultaneously adding the attapulgite into a stirrer, and stirring for 30min to obtain a mixture; the mixing mass ratio of the silicon micro powder to the attapulgite is 12:1; wherein the granularity of the silicon micropowder is 350 meshes; the granularity of the attapulgite is 250 meshes;
(2) Adding the prepared mixture into a reaction kettle, adding ethanol into the reaction kettle, and stirring at a rotating speed of 500r/min for 30min to obtain mixed slurry; the mixing mass ratio of the mixture to the ethanol is 1:15;
(3) Regulating the temperature in the reaction kettle to 70 ℃, preserving heat for 15min, then adding a coupling agent and ethyl benzoate into the reaction kettle, firstly regulating the temperature to 88 ℃, preserving heat, stirring at a rotating speed of 150r/min for 30min, then reducing the temperature to 60 ℃, continuously preserving heat, stirring at a rotating speed of 200r/min for 1 h, and discharging to obtain a reaction material; the mixing mass ratio of the coupling agent to the ethyl benzoate is 3:1;
the mixing mass ratio of the mixed slurry to the coupling agent is 10:1.
The coupling agent is titanate coupling agent;
(4) And filtering the reaction material, washing the reaction material to be neutral, and then performing constant-temperature drying treatment to obtain the modified doped silicon micropowder. The constant temperature of the constant temperature drying treatment is 55 ℃; the constant temperature drying treatment time is 4 hours; the antioxidant is phosphite antioxidant; the inorganic fiber is basalt fiber; the inorganic filler is calcium carbonate.
A method for preparing high-rigidity polypropylene for a cup, comprising the following steps:
(1) Weighing the raw material components according to parts by weight respectively;
(2) Sequentially adding polypropylene resin, modified doped silica micropowder, antioxidant, polyethylene resin, inorganic fiber and inorganic filler into a high-speed mixer for mixing treatment, wherein the mixing stirring speed in the high-speed mixer is 2000r/min, and the mixing time is 10min, so as to obtain a uniformly mixed material;
(3) Adding the uniformly mixed materials into an extruder for melt extrusion granulation;
wherein the extruder used is a twin screw extruder.
Example 2
The high-rigidity polypropylene for the cup is prepared from the following components in parts by weight: 90 parts of polypropylene, 16 parts of modified doped silica micropowder, 1.5 parts of antioxidant, 5 parts of polyethylene, 0.6 part of inorganic fiber and 14 parts of inorganic filler;
the weight ratio of the modified doped silica micropowder to the inorganic fiber is 3:1;
wherein the molecular weight of the polyethylene is 20000;
the molecular weight of the polypropylene is 5000.
The preparation method of the modified doped silicon micropowder comprises the following steps:
(1) Firstly, adding attapulgite into silicon micropowder, then simultaneously adding the attapulgite into a stirrer, and stirring for 35min to obtain a mixture; the mixing mass ratio of the silicon micro powder to the attapulgite is 12:1.5; wherein the granularity of the silicon micropowder is 350 meshes; the granularity of the attapulgite is 250 meshes;
(2) Adding the prepared mixture into a reaction kettle, adding ethanol into the reaction kettle, and stirring at a rotating speed of 500r/min for 30min to obtain mixed slurry; the mixing mass ratio of the mixture to the ethanol is 1:16;
(3) Regulating the temperature in the reaction kettle to 71 ℃, preserving heat for 15min, then adding a coupling agent and ethyl benzoate into the reaction kettle, firstly regulating the temperature to 89 ℃, preserving heat, stirring at a rotating speed of 150r/min for 35min, then reducing the temperature to 62 ℃, continuously preserving heat, stirring at a rotating speed of 200r/min for 1 h, and discharging to obtain a reaction material; the mixing mass ratio of the coupling agent to the ethyl benzoate is 3:1.5;
the mixing mass ratio of the mixed slurry to the coupling agent is 10:1.2.
The coupling agent is titanate coupling agent;
(4) And filtering the reaction material, washing the reaction material to be neutral, and then performing constant-temperature drying treatment to obtain the modified doped silicon micropowder. The constant temperature of the constant temperature drying treatment is 56 ℃; the constant temperature drying treatment time is 4 hours; the antioxidant is phosphite antioxidant; the inorganic fiber is basalt fiber; the inorganic filler is calcium carbonate.
A method for preparing high-rigidity polypropylene for a cup, comprising the following steps:
(1) Weighing the raw material components according to parts by weight respectively;
(2) Sequentially adding polypropylene resin, modified doped silica micropowder, antioxidant, polyethylene resin, inorganic fiber and inorganic filler into a high-speed mixer for mixing treatment, wherein the mixing stirring speed in the high-speed mixer is 2000r/min, and the mixing time is 10min, so as to obtain a uniformly mixed material;
(3) Adding the uniformly mixed materials into an extruder for melt extrusion granulation;
wherein the extruder used is a twin screw extruder.
Example 3
The high-rigidity polypropylene for the cup is prepared from the following components in parts by weight: 92 parts of polypropylene, 18 parts of modified doped silica micropowder, 3 parts of antioxidant, 5 parts of polyethylene, 0.7 part of inorganic fiber and 15 parts of inorganic filler;
the weight ratio of the modified doped silica micropowder to the inorganic fiber is 3:1;
wherein the molecular weight of the polyethylene is 20000;
the molecular weight of the polypropylene is 5000.
The preparation method of the modified doped silicon micropowder comprises the following steps:
(1) Firstly, adding attapulgite into silicon micropowder, then simultaneously adding the attapulgite into a stirrer, and stirring for 35min to obtain a mixture; the mixing mass ratio of the silicon micro powder to the attapulgite is 12:1.8; wherein the granularity of the silicon micropowder is 350 meshes; the granularity of the attapulgite is 250 meshes;
(2) Adding the prepared mixture into a reaction kettle, adding ethanol into the reaction kettle, and stirring at a rotating speed of 500r/min for 30min to obtain mixed slurry; the mixing mass ratio of the mixture to the ethanol is 1:18;
(3) Regulating the temperature in the reaction kettle to 72 ℃, preserving heat for 15min, then adding a coupling agent and ethyl benzoate into the reaction kettle, firstly regulating the temperature to 89 ℃, preserving heat, stirring at a rotating speed of 150r/min for 35min, then reducing the temperature to 61 ℃, continuously preserving heat, stirring at a rotating speed of 200r/min for 1 h, and discharging to obtain a reaction material; the mixing mass ratio of the coupling agent to the ethyl benzoate is 3:1.5;
the mixing mass ratio of the mixed slurry to the coupling agent is 10:1.2.
The coupling agent is titanate coupling agent;
(4) And filtering the reaction material, washing the reaction material to be neutral, and then performing constant-temperature drying treatment to obtain the modified doped silicon micropowder. The constant temperature of the constant temperature drying treatment is 58 ℃; the constant temperature drying treatment time is 4 hours; the antioxidant is phosphite antioxidant; the inorganic fiber is basalt fiber; the inorganic filler is calcium carbonate.
A method for preparing high-rigidity polypropylene for a cup, comprising the following steps:
(1) Weighing the raw material components according to parts by weight respectively;
(2) Sequentially adding polypropylene resin, modified doped silica micropowder, antioxidant, polyethylene resin, inorganic fiber and inorganic filler into a high-speed mixer for mixing treatment, wherein the mixing stirring speed in the high-speed mixer is 2000r/min, and the mixing time is 10min, so as to obtain a uniformly mixed material;
(3) Adding the uniformly mixed materials into an extruder for melt extrusion granulation;
wherein the extruder used is a twin screw extruder.
Example 4
The high-rigidity polypropylene for the cup is prepared from the following components in parts by weight: 93 parts of polypropylene, 21 parts of modified doped silica micropowder, 3 parts of antioxidant, 5 parts of polyethylene, 0.7 part of inorganic fiber and 14 parts of inorganic filler;
the weight ratio of the modified doped silica micropowder to the inorganic fiber is 3:1;
wherein the molecular weight of the polyethylene is 20000;
the molecular weight of the polypropylene is 5000.
The preparation method of the modified doped silicon micropowder comprises the following steps:
(1) Firstly, adding attapulgite into silicon micropowder, then simultaneously adding the attapulgite into a stirrer, and stirring for 35min to obtain a mixture; the mixing mass ratio of the silicon micro powder to the attapulgite is 12:1.5; wherein the granularity of the silicon micropowder is 350 meshes; the granularity of the attapulgite is 250 meshes;
(2) Adding the prepared mixture into a reaction kettle, adding ethanol into the reaction kettle, and stirring at a rotating speed of 500r/min for 30min to obtain mixed slurry; the mixing mass ratio of the mixture to the ethanol is 1:18;
(3) Regulating the temperature in the reaction kettle to 72 ℃, preserving heat for 15min, then adding a coupling agent and ethyl benzoate into the reaction kettle, firstly regulating the temperature to 89 ℃, preserving heat, stirring at a rotating speed of 150r/min for 36min, then reducing the temperature to 65 ℃, continuously preserving heat, stirring at a rotating speed of 200r/min for 1 h, and discharging to obtain a reaction material; the mixing mass ratio of the coupling agent to the ethyl benzoate is 3:1.1;
the mixing mass ratio of the mixed slurry to the coupling agent is 10:1.1.
The coupling agent is titanate coupling agent;
(4) And filtering the reaction material, washing the reaction material to be neutral, and then performing constant-temperature drying treatment to obtain the modified doped silicon micropowder. The constant temperature of the constant temperature drying treatment is 56 ℃; the constant temperature drying treatment time is 4 hours; the antioxidant is phosphite antioxidant; the inorganic fiber is basalt fiber; the inorganic filler is calcium carbonate.
A method for preparing high-rigidity polypropylene for a cup, comprising the following steps:
(1) Weighing the raw material components according to parts by weight respectively;
(2) Sequentially adding polypropylene resin, modified doped silica micropowder, antioxidant, polyethylene resin, inorganic fiber and inorganic filler into a high-speed mixer for mixing treatment, wherein the mixing stirring speed in the high-speed mixer is 2000r/min, and the mixing time is 10min, so as to obtain a uniformly mixed material;
(3) Adding the uniformly mixed materials into an extruder for melt extrusion granulation;
wherein the extruder used is a twin screw extruder.
Example 5
The high-rigidity polypropylene for the cup is prepared from the following components in parts by weight: 94 parts of polypropylene, 22 parts of modified doped silica micropowder, 3 parts of antioxidant, 5 parts of polyethylene, 0.7 part of inorganic fiber and 15 parts of inorganic filler;
the weight ratio of the modified doped silica micropowder to the inorganic fiber is 3:1;
wherein the molecular weight of the polyethylene is 20000;
the molecular weight of the polypropylene is 5000.
The preparation method of the modified doped silicon micropowder comprises the following steps:
(1) Firstly, adding attapulgite into silicon micropowder, then simultaneously adding the attapulgite into a stirrer, and stirring for 35min to obtain a mixture; the mixing mass ratio of the silicon micro powder to the attapulgite is 12:1.5; wherein the granularity of the silicon micropowder is 350 meshes; the granularity of the attapulgite is 250 meshes;
(2) Adding the prepared mixture into a reaction kettle, adding ethanol into the reaction kettle, and stirring at a rotating speed of 500r/min for 30min to obtain mixed slurry; the mixing mass ratio of the mixture to the ethanol is 1:16;
(3) Regulating the temperature in the reaction kettle to 76 ℃, preserving heat for 15min, then adding a coupling agent and ethyl benzoylformate into the reaction kettle, firstly regulating the temperature to 88 ℃, preserving heat, stirring at a rotating speed of 150r/min for 40min, then reducing the temperature to 60 ℃, continuously preserving heat, stirring at a rotating speed of 200r/min for 1 h, and discharging to obtain a reaction material; the mixing mass ratio of the coupling agent to the ethyl benzoate is 3:2;
the mixing mass ratio of the mixed slurry to the coupling agent is 10:1.2.
The coupling agent is titanate coupling agent;
(4) And filtering the reaction material, washing the reaction material to be neutral, and then performing constant-temperature drying treatment to obtain the modified doped silicon micropowder. The constant temperature of the constant temperature drying treatment is 57 ℃; the constant temperature drying treatment time is 4 hours; the antioxidant is phosphite antioxidant; the inorganic fiber is basalt fiber; the inorganic filler is calcium carbonate.
A method for preparing high-rigidity polypropylene for a cup, comprising the following steps:
(1) Weighing the raw material components according to parts by weight respectively;
(2) Sequentially adding polypropylene resin, modified doped silica micropowder, antioxidant, polyethylene resin, inorganic fiber and inorganic filler into a high-speed mixer for mixing treatment, wherein the mixing stirring speed in the high-speed mixer is 2000r/min, and the mixing time is 10min, so as to obtain a uniformly mixed material;
(3) Adding the uniformly mixed materials into an extruder for melt extrusion granulation;
wherein the extruder used is a twin screw extruder.
Example 6
The high-rigidity polypropylene for the cup is prepared from the following components in parts by weight: 95 parts of polypropylene, 24 parts of modified doped silica micropowder, 4 parts of antioxidant, 6 parts of polyethylene, 0.8 part of inorganic fiber and 16 parts of inorganic filler;
the weight ratio of the modified doped silica micropowder to the inorganic fiber is 3:1;
wherein the molecular weight of the polyethylene is 20000;
the molecular weight of the polypropylene is 5000.
The preparation method of the modified doped silicon micropowder comprises the following steps:
(1) Firstly, adding attapulgite into silicon micropowder, then simultaneously adding the attapulgite into a stirrer, and stirring for 38min to obtain a mixture; the mixing mass ratio of the silicon micro powder to the attapulgite is 12:2; wherein the granularity of the silicon micropowder is 350 meshes; the granularity of the attapulgite is 250 meshes;
(2) Adding the prepared mixture into a reaction kettle, adding ethanol into the reaction kettle, and stirring at a rotating speed of 500r/min for 30min to obtain mixed slurry; the mixing mass ratio of the mixture to the ethanol is 1:20;
(3) Regulating the temperature in the reaction kettle to 78 ℃, preserving heat for 15min, then adding a coupling agent and ethyl benzoate into the reaction kettle, firstly regulating the temperature to 90 ℃, preserving heat, stirring at a rotating speed of 150r/min for 40min, then reducing the temperature to 66 ℃, continuously preserving heat, stirring at a rotating speed of 200r/min for 1 h, and discharging to obtain a reaction material; the mixing mass ratio of the coupling agent to the ethyl benzoate is 3:2;
the mixing mass ratio of the mixed slurry to the coupling agent is 10:1.5.
The coupling agent is titanate coupling agent;
(4) And filtering the reaction material, washing the reaction material to be neutral, and then performing constant-temperature drying treatment to obtain the modified doped silicon micropowder. The constant temperature of the constant temperature drying treatment is 60 ℃; the constant temperature drying treatment time is 4 hours; the antioxidant is phosphite antioxidant; the inorganic fiber is basalt fiber; the inorganic filler is calcium carbonate.
A method for preparing high-rigidity polypropylene for a cup, comprising the following steps:
(1) Weighing the raw material components according to parts by weight respectively;
(2) Sequentially adding polypropylene resin, modified doped silica micropowder, antioxidant, polyethylene resin, inorganic fiber and inorganic filler into a high-speed mixer for mixing treatment, wherein the mixing stirring speed in the high-speed mixer is 2000r/min, and the mixing time is 10min, so as to obtain a uniformly mixed material;
(3) Adding the uniformly mixed materials into an extruder for melt extrusion granulation;
wherein the extruder used is a twin screw extruder.
Comparative example 1: the difference from example 1 is that no modified doped silica micropowder was added;
comparative example 2: the difference from example 1 is that the modified doped silica fume was replaced with an equivalent amount of untreated silica fume.
Injection molding is carried out on the samples of the examples and the comparative examples to obtain experimental samples of 20cm multiplied by 10cm multiplied by 5cm;
and (3) testing:
tensile strength was measured with reference to GB/T1040.2-2006:
TABLE 1
| Tensile Strength/MPa | |
| Example 1 | 41.5 |
| Example 2 | 42.8 |
| Example 3 | 42.3 |
| Example 4 | 43.9 |
| Example 5 | 42.5 |
| Example 6 | 41.9 |
| Comparative example 1 | 36.7 |
| Comparative example 2 | 38.5 |
As can be seen from Table 1, the polypropylene material prepared by the invention has excellent tensile strength, and the tensile property of the polypropylene material can be effectively improved by introducing modified doped silica micropowder.
Impact strength was measured with reference to GB/T1043.1-2008:
TABLE 2
As can be seen from Table 2, the impact strength of the polypropylene material prepared by the method of the present invention is significantly improved.
Hardness reference: GB/T9342 detection:
TABLE 3 Table 3
| Rockwell hardness | |
| Example 1 | 68 |
| Example 2 | 67 |
| Example 3 | 69 |
| Example 4 | 68 |
| Example 5 | 67 |
| Example 6 | 67 |
| Comparative example 1 | 58 |
| Comparative example 2 | 60 |
As can be seen from Table 3, the hardness of the polypropylene material prepared by the method of the present invention is greatly improved.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The high-rigidity polypropylene for the cup is characterized by comprising the following components in parts by weight: 88-95 parts of polypropylene, 15-24 parts of modified doped silica micropowder, 1-4 parts of antioxidant, 4-6 parts of polyethylene, 0.5-0.8 part of inorganic fiber and 13-16 parts of inorganic filler;
the weight ratio of the modified doped silica micropowder to the inorganic fiber is 3:1;
wherein the molecular weight of the polyethylene is 20000;
the molecular weight of the polypropylene is 5000.
2. The high rigidity polypropylene for cup according to claim 1, wherein the modified doped silica micropowder preparation method comprises the steps of:
(1) Firstly, adding attapulgite into silicon micropowder, then simultaneously adding the attapulgite into a stirrer, and stirring for 30-40min to obtain a mixture;
(2) Adding the prepared mixture into a reaction kettle, adding ethanol into the reaction kettle, and stirring at a rotating speed of 500r/min for 30min to obtain mixed slurry;
(3) Regulating the temperature in the reaction kettle to 70-78 ℃, preserving heat for 15min, then adding a coupling agent and ethyl benzoate into the reaction kettle, firstly regulating the temperature to 88-90 ℃, preserving heat, stirring at a rotating speed of 150r/min for 30-40min, then reducing the temperature to 60-66 ℃, continuously preserving heat, stirring at a rotating speed of 200r/min for 1 h, and discharging to obtain a reaction material;
(4) And filtering the reaction material, washing the reaction material to be neutral, and then performing constant-temperature drying treatment to obtain the modified doped silicon micropowder.
3. The high-rigidity polypropylene for a cup according to claim 2, wherein the mixing mass ratio of the silica powder to the attapulgite in the step (1) is 12:1-2;
wherein the granularity of the silicon micropowder is 350 meshes;
the granularity of the attapulgite is 250 meshes.
4. A high rigidity polypropylene for cups as claimed in claim 2 wherein: the mixing mass ratio of the mixture to the ethanol in the step (2) is 1:15-20.
5. A high rigidity polypropylene for cup according to claim 2, wherein the mixing mass ratio of the coupling agent and ethyl benzoate in the step (3) is 3:1-2;
the mixing mass ratio of the mixed slurry to the coupling agent is 10:1-1.5.
6. A high rigidity polypropylene for cups as claimed in claim 5 wherein said coupling agent is a titanate coupling agent.
7. A high rigidity polypropylene for cups as claimed in claim 2 wherein: the constant temperature of the constant temperature drying treatment in the step (4) is 55-60 ℃;
the time for the constant temperature drying treatment was 4 hours.
8. A high rigidity polypropylene for cups as claimed in claim 1 wherein: the antioxidant is phosphite antioxidant.
9. A high rigidity polypropylene for cups as claimed in claim 1 wherein: the inorganic fibers are basalt fibers;
the inorganic filler is calcium carbonate.
10. A method of producing a high rigidity polypropylene for cups as claimed in claim 1 wherein: the method comprises the following steps:
(1) Weighing the raw material components according to parts by weight respectively;
(2) Sequentially adding polypropylene resin, modified doped silica micropowder, antioxidant, polyethylene resin, inorganic fiber and inorganic filler into a high-speed mixer for mixing treatment, wherein the mixing stirring speed in the high-speed mixer is 2000r/min, and the mixing time is 10min, so as to obtain a uniformly mixed material;
(3) Adding the uniformly mixed materials into an extruder for melt extrusion granulation;
wherein the extruder used is a twin screw extruder.
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