CN116606532A - Shock-resistant buffer material for polypropylene insulated cable and preparation method and application thereof - Google Patents
Shock-resistant buffer material for polypropylene insulated cable and preparation method and application thereof Download PDFInfo
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- CN116606532A CN116606532A CN202310508123.5A CN202310508123A CN116606532A CN 116606532 A CN116606532 A CN 116606532A CN 202310508123 A CN202310508123 A CN 202310508123A CN 116606532 A CN116606532 A CN 116606532A
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- Prior art keywords
- modified polyester
- polyester rubber
- chain extender
- buffer material
- polypropylene
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- 239000000463 material Substances 0.000 title claims abstract description 134
- 239000000872 buffer Substances 0.000 title claims abstract description 70
- 239000004743 Polypropylene Substances 0.000 title claims abstract description 42
- -1 polypropylene Polymers 0.000 title claims abstract description 41
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 41
- 230000035939 shock Effects 0.000 title claims abstract description 19
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 229920001971 elastomer Polymers 0.000 claims abstract description 66
- 239000005060 rubber Substances 0.000 claims abstract description 62
- 229920000728 polyester Polymers 0.000 claims abstract description 59
- 239000004970 Chain extender Substances 0.000 claims abstract description 43
- 239000004088 foaming agent Substances 0.000 claims abstract description 39
- 238000002156 mixing Methods 0.000 claims abstract description 23
- 239000000843 powder Substances 0.000 claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 claims abstract description 16
- 238000006243 chemical reaction Methods 0.000 claims abstract description 8
- 239000003063 flame retardant Substances 0.000 claims description 33
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 21
- 238000001125 extrusion Methods 0.000 claims description 21
- 239000003963 antioxidant agent Substances 0.000 claims description 16
- 230000003078 antioxidant effect Effects 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 15
- 239000004156 Azodicarbonamide Substances 0.000 claims description 14
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 14
- XOZUGNYVDXMRKW-AATRIKPKSA-N azodicarbonamide Chemical compound NC(=O)\N=N\C(N)=O XOZUGNYVDXMRKW-AATRIKPKSA-N 0.000 claims description 14
- 235000019399 azodicarbonamide Nutrition 0.000 claims description 14
- WOZVHXUHUFLZGK-UHFFFAOYSA-N dimethyl terephthalate Chemical compound COC(=O)C1=CC=C(C(=O)OC)C=C1 WOZVHXUHUFLZGK-UHFFFAOYSA-N 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 11
- PSGCQDPCAWOCSH-UHFFFAOYSA-N (4,7,7-trimethyl-3-bicyclo[2.2.1]heptanyl) prop-2-enoate Chemical compound C1CC2(C)C(OC(=O)C=C)CC1C2(C)C PSGCQDPCAWOCSH-UHFFFAOYSA-N 0.000 claims description 10
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 claims description 9
- 230000003139 buffering effect Effects 0.000 claims description 9
- 239000004020 conductor Substances 0.000 claims description 9
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 claims description 8
- 239000004005 microsphere Substances 0.000 claims description 7
- 239000002994 raw material Substances 0.000 claims description 7
- 239000004408 titanium dioxide Substances 0.000 claims description 7
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 6
- 239000012752 auxiliary agent Substances 0.000 claims description 6
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 6
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims description 6
- DXZMANYCMVCPIM-UHFFFAOYSA-L zinc;diethylphosphinate Chemical group [Zn+2].CCP([O-])(=O)CC.CCP([O-])(=O)CC DXZMANYCMVCPIM-UHFFFAOYSA-L 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 229910052901 montmorillonite Inorganic materials 0.000 claims description 5
- OKOBUGCCXMIKDM-UHFFFAOYSA-N Irganox 1098 Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)NCCCCCCNC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 OKOBUGCCXMIKDM-UHFFFAOYSA-N 0.000 claims description 4
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 claims description 4
- 239000000806 elastomer Substances 0.000 claims description 4
- 229910002804 graphite Inorganic materials 0.000 claims description 4
- 239000010439 graphite Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 claims description 4
- XZTOTRSSGPPNTB-UHFFFAOYSA-N phosphono dihydrogen phosphate;1,3,5-triazine-2,4,6-triamine Chemical compound NC1=NC(N)=NC(N)=N1.OP(O)(=O)OP(O)(O)=O XZTOTRSSGPPNTB-UHFFFAOYSA-N 0.000 claims description 4
- XNINAOUGJUYOQX-UHFFFAOYSA-N 2-cyanobutanoic acid Chemical compound CCC(C#N)C(O)=O XNINAOUGJUYOQX-UHFFFAOYSA-N 0.000 claims description 3
- 238000006845 Michael addition reaction Methods 0.000 claims description 3
- 229920000459 Nitrile rubber Polymers 0.000 claims description 3
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 claims description 3
- ZQKXQUJXLSSJCH-UHFFFAOYSA-N melamine cyanurate Chemical compound NC1=NC(N)=NC(N)=N1.O=C1NC(=O)NC(=O)N1 ZQKXQUJXLSSJCH-UHFFFAOYSA-N 0.000 claims description 3
- 229920000909 polytetrahydrofuran Polymers 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 239000004604 Blowing Agent Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 3
- 238000010521 absorption reaction Methods 0.000 abstract 1
- 239000002585 base Substances 0.000 description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- 238000013016 damping Methods 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 10
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 8
- 238000003860 storage Methods 0.000 description 8
- 238000005469 granulation Methods 0.000 description 7
- 230000003179 granulation Effects 0.000 description 7
- 230000008859 change Effects 0.000 description 5
- 238000009775 high-speed stirring Methods 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 238000005187 foaming Methods 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 4
- 235000017557 sodium bicarbonate Nutrition 0.000 description 4
- 238000009954 braiding Methods 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 230000009477 glass transition Effects 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229920001169 thermoplastic Polymers 0.000 description 3
- 239000004416 thermosoftening plastic Substances 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 239000005457 ice water Substances 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 229920011453 Hytrel® 4056 Polymers 0.000 description 1
- 239000004594 Masterbatch (MB) Substances 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 238000010793 Steam injection (oil industry) Methods 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
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- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 125000003916 ethylene diamine group Chemical group 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- 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
- C08J9/06—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 chemical blowing agent
- C08J9/10—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 chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
- C08J9/102—Azo-compounds
- C08J9/103—Azodicarbonamide
-
- 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
-
- 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
- C08J9/0066—Use of inorganic compounding ingredients
-
- 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
- C08J9/06—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 chemical blowing agent
- C08J9/08—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 chemical blowing agent developing carbon dioxide
-
- 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
- C08J9/32—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof from compositions containing microballoons, e.g. syntactic foams
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
-
- 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
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/02—CO2-releasing, e.g. NaHCO3 and citric acid
-
- 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
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/04—N2 releasing, ex azodicarbonamide or nitroso compound
-
- 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
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
-
- 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
- C08J2413/00—Characterised by the use of rubbers containing carboxyl groups
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
The application firstly discloses an anti-seismic buffer material for a polypropylene insulated cable, which comprises grafted modified polyester rubber, a modified chain extender and a foaming agent, wherein the modified chain extender acts on the grafted modified polyester rubber to enable the grafted modified polyester rubber to undergo a chain extension reaction. Secondly, the preparation method of the anti-seismic buffer material is disclosed, which comprises the steps of mixing a chain extender base material and a powder base material; mixing the grafted modified polyester rubber and a modified chain extender, and carrying out chain extension on the grafted modified polyester rubber; and mixing the grafted modified polyester rubber after chain extension with a foaming agent, and extruding and forming to obtain the anti-seismic buffer material. Finally, the application of the material in cables is disclosed, and the grafted modified polyester rubber is directly extruded out of the sheath after being mixed with the foaming agent. According to the application, the anti-seismic buffer material with excellent shock absorption and buffer effects is directly extruded outside the cable core, so that the cable structure is simplified, the manufacturing difficulty is reduced, and the mass production yield is improved.
Description
Technical Field
The application relates to the technical field of high polymer insulating materials, in particular to an anti-seismic buffer material for a polypropylene insulating cable, and a preparation method and application thereof.
Background
Along with the acceleration of the social and economic processes in China, the demands of people on travel are also increasing, and rail transit is popular with more people as a high-efficiency, rapid, safe and environment-friendly transportation mode. In recent years, the rail transit industry in China is rapidly developed, the number of the rail transit industry is greatly increased, and the technical level, the service quality and the like of the rail transit industry are also greatly improved. While wire and cable are important components for providing power supply for rail traffic, it is self-evident to traffic safety.
The cable for rail transit is generally used in a scene with intensive personnel, so the requirement on the flame retardant property of the cable is higher, and the key of the flame retardant property of the cable is the flame retardant property of the sheath material; in order to improve the flame retardant property of the sheath material, a large amount of flame retardant is added in the sheath material, the mechanical property of the cable material is correspondingly deteriorated along with the addition of the flame retardant, particularly, the vibration caused by the running of a train is more and more intense along with the overall speed increasing of rail traffic, the shock resistance of a common cable is limited, and the cable is broken once the vibration exceeds a certain limit.
In order to solve the harm caused by vibration, in the prior art, the vibration resistance of the cable is mainly realized by adding a damping structure or a component in the cable, such as a damping bulge, a damping rubber pad, an energy dissipation rib filled in a cavity, an elastic filling material, an elastic supporting bar with a triangular structure, a vibration-resistant damping silk screen, an aramid rope filled, a honeycomb-shaped cavity arranged, an internal air chamber arranged and the like. Chinese patent publication No. CN218585681U discloses a B1-level flame retardant control cable, including four insulating layers, the inside of insulating layer is provided with a plurality of conductors, the outside of four insulating layers is provided with the glass fiber layer, the outside of four insulating layers is provided with fire-retardant filler, the outside of buffer board is provided with first fire-retardant rubber cover, the outside annular array of first fire-retardant rubber cover is provided with a plurality of second buffer lugs, be provided with first buffer lug between two adjacent second buffer lugs, the outside of first buffer lug is provided with the fire-retardant rubber cover of second, the outside of buffer layer is provided with the protection fire-retardant layer, the outside of protection fire-retardant layer is provided with the oversheath. The first buffer convex blocks and the second buffer convex blocks are arranged to achieve the purpose of shock resistance and buffer.
However, such a method of providing an anti-seismic assembly in a cable structure increases the difficulty in manufacturing the cable, increases the outer diameter of the cable, and cannot fundamentally solve the problem that the sheath is easy to crack when used for a long time in a vibration environment.
Disclosure of Invention
In order to solve the problem that the existing anti-seismic cable sheath is easy to crack after long-term use in a vibration environment, the first aim of the application is to provide an anti-seismic buffer material for a polypropylene insulation cable, and the graft modified polyester rubber is subjected to chain extension reaction by adding a modified chain extender into the graft modified polyester rubber, so that the melt viscosity and strength of the polyester rubber are improved, and the glass transition temperature and the melting temperature of the polyester rubber are improved; and mixing the grafted modified polyester rubber after chain extension with a foaming agent, and extruding the foaming polyester rubber material with excellent damping and buffering effects.
The second aim of the application is to provide a preparation method of the anti-seismic buffer material for the polypropylene insulated cable, which shortens the production period of the foaming polyester rubber and improves the production efficiency of the anti-seismic buffer material.
The third object of the present application is to provide an application of an anti-seismic buffer material for a polypropylene insulated cable in the cable, by directly extruding the anti-seismic buffer material with excellent damping and buffering effects outside the cable core, thereby bypassing the technical route that the damping structure or components are added in the cable to achieve the damping effect in the prior art, simplifying the cable structure, reducing the outer diameter of the cable, reducing the manufacturing difficulty and improving the mass production yield.
In order to achieve the first object of the present application, the present application provides an anti-seismic buffer material for polypropylene insulated cables, which adopts the following technical scheme:
the shock-resistant buffer material for the polypropylene insulated cable is characterized by comprising the following raw materials in parts by weight:
60-70 parts of graft modified polyester rubber
3.5 to 9 portions of modified chain extender
8-15 parts of foaming agent
The modified chain extender is a mixture of a chain extender base material and a powder base material, and acts on the grafted modified polyester rubber to cause the grafted modified polyester rubber to undergo a chain extension reaction.
Implementations may include any or all of the following features.
Further, the shock-resistant cushioning material further includes:
10 to 40 portions of flame retardant
0.3 to 0.7 part of antioxidant
Further, the anti-seismic buffer material comprises the following raw materials in parts by weight:
further, the chain extender base material comprises the following raw materials in parts by weight:
15-20 parts of ethylenediamine
40-60 parts of diphenylmethane diisocyanate
25-40 parts of isobornyl acrylate
The ethylenediamine, the diphenylmethane diisocyanate and the isobornyl acrylate undergo a Michael addition reaction.
Further, the powder base material comprises one or a mixture of more of carboxylated nitrile rubber powder, nano titanium dioxide and titanium dioxide.
Further, the powder base material is a mixture of carboxylated nitrile rubber powder, nano titanium dioxide and titanium dioxide in a mass part ratio of 2:2:5.
Further, the graft modified polyester rubber is synthesized by an auxiliary agent and a polyester elastomer, wherein the auxiliary agent is one of polytetrahydrofuran ether (PTMG), dimethyl terephthalate (DMT) and 1, 4-butanediol (1, 4-BD).
Further, the flame retardant is a halogen-free flame retardant, and the halogen-free flame retardant is one or a mixture of more of melamine cyanurate, melamine pyrophosphate, pentaerythritol, nano montmorillonite and expandable graphite.
Further, the antioxidant is one or a mixture of more of antioxidant 1010, antioxidant 1098, antioxidant 168 or antioxidant 619F.
Further, the foaming agent comprises an organic foaming agent Azodicarbonamide (AC), an inorganic foaming agent NaHCO3 and a microsphere foaming agent 950DU.
In order to achieve the second object of the present application, the present application provides a preparation method of an anti-seismic buffer material for a polypropylene insulated cable, which adopts the following technical scheme:
the preparation method of the shock-resistant buffer material for the polypropylene insulated cable is characterized by comprising the following steps of:
mixing a chain extender base material and a powder base material to obtain a modified chain extender;
mixing the grafted modified polyester rubber and a modified chain extender, and carrying out chain extension on the grafted modified polyester rubber;
and mixing the grafted modified polyester rubber after chain extension with a foaming agent, and extruding and forming to obtain the anti-seismic buffer material.
Further, when the graft modified polyester rubber is subjected to chain extension, a flame retardant and an antioxidant are also added.
Further, the grafted modified polyester rubber after chain extension and the foaming agent are mixed and extruded according to the mass part ratio of 100:13.
Further, during extrusion molding, an N2 gas injection system is added to the extruder head.
In order to achieve the third object of the application, the application provides an application of an anti-seismic buffer material for a polypropylene insulated cable in the cable, which adopts the following technical scheme:
further, the cable also comprises a cable core, a semiconductive conductor shield, an insulating layer, a semiconductive insulation shield, a semiconductive water-blocking buffer layer, a metal shield, a water-blocking buffer layer and a radial water-blocking layer.
Further, the semiconductive shield, the insulating layer, and the semiconductive insulating shield are formed by one extrusion through a three-layer coextrusion technique.
Further, the radial water blocking layer and the sheath are completed by a set of procedures.
In summary, the application provides an anti-seismic buffer material for a polypropylene insulated cable, and a preparation method and application thereof, and the anti-seismic buffer material has the following beneficial effects:
according to the application, the modified chain extender is added into the grafted modified polyester rubber, so that the grafted modified polyester rubber is subjected to chain extension reaction, the melt viscosity and strength of the polyester rubber are improved, and the glass transition temperature and the melting temperature of the polyester rubber are improved; the anti-seismic buffer material with excellent damping and buffering effects is directly extruded out of the cable core, so that the technical route that damping structures or components are required to be added in the cable to achieve the damping effect in the prior art is bypassed, the cable structure is simplified, the outer diameter of the cable is reduced, the manufacturing difficulty is reduced, and the yield of mass production is improved.
Detailed Description
The following detailed description does not address specific experimental procedures or conditions, and may be conducted in accordance with the procedures or conditions of conventional experimental procedures described in the literature in this field. The reagents or apparatus used were conventional reagent products commercially available without the manufacturer's knowledge. The term "comprising" is intended to be open-ended and may be replaced by "consisting of … …" where appropriate. Herein, unless otherwise indicated, percentages refer to weight/weight percentages. Except in the examples, or where otherwise explicitly indicated, all numbers in the description and in the claims indicating amounts of material quality, physical properties and the like are to be understood as modified by the word "about".
The application firstly discloses an anti-seismic buffer material for a polypropylene insulated cable, which is a modified foaming polyester rubber material formed by adding a chain extension modifier into grafted modified polyester rubber, so that the material has excellent mechanical property, flame retardant property and buffering and damping properties.
In some embodiments, the anti-seismic buffer material may include the following raw materials in parts by weight:
the graft modified polyester rubber is synthesized by an auxiliary agent and a polyester elastomer, wherein the auxiliary agent can be polytetrahydrofuran ether (PTMG), dimethyl terephthalate (DMT) or 1, 4-butanediol (1, 4-BD) and the like, and the polyester elastomer can be one or more of compound with the brand numbers of morning light H605B, duPont Hytrel4056 and DuPont Hytrel 4275.
The flame retardant is a halogen-free flame retardant, and the halogen-free flame retardant can comprise one or more of melamine cyanurate, melamine pyrophosphate, pentaerythritol, nano montmorillonite and expandable graphite; preferably, in some embodiments, the halogen-free flame retardant is compounded by melamine pyrophosphate, pentaerythritol, nano montmorillonite and expandable graphite according to the mass ratio of 24:3:5:5, the nano montmorillonite can effectively reduce the smoke generation amount in the material combustion process, and the flame retardant and catalytic char formation mechanism of phosphorus element in the material enables the material to have higher thermal stability and better char formation, so that the compound has excellent flame retardant property and low smoke property.
The antioxidant can be one or more of antioxidant 1010, antioxidant 1098, antioxidant 168 or antioxidant 619F, and preferably, in some embodiments, the antioxidant is formed by mixing antioxidant 1010 and antioxidant 1098 according to a mass ratio of 1:1. The addition of the antioxidant makes up the defect that the polyester rubber material is easy to become color and age under the photo-thermal condition, so that the synthesized material has good color change resistance and ageing resistance.
The foaming agent can be EVA foaming master batch, and can be prepared from organic foaming agent Azodicarbonamide (AC) and inorganic foaming agent NaHCO 3 And microsphere foaming agent 950DU in the mass ratio of (12-17) to (0.8-1.2) to (0.3-0.6), preferably, in some embodiments, the foaming agent is formed by mixing organic foaming agent Azodicarbonamide (AC), inorganic foaming agent NaHCO3 and microsphere foaming agent 950DU in the mass ratio of 15:1:0.5.
The modified chain extender is prepared by taking ethylenediamine, diphenylmethane diisocyanate (MDI) and isobornyl acrylate (IBOA) as main raw materials and carrying out Michael addition reaction to prepare the chain extender containing a cyclic structure, and in some embodiments, the modified chain extender can be obtained by the following method:
15-20 parts of ethylenediamine and 40-60 parts of MDI are added into a four-neck flask with a stirrer, a thermometer and a reflux condenser according to parts by weight, 25-40 parts of IBOA is added dropwise through a constant pressure dropping funnel, and the temperature is controlled by adopting ice water bath cooling, and the reaction temperature is controlled below 25 ℃. After the IBOA is added dropwise, preserving heat for 12 hours at 30-35 ℃ to prepare a chain extender base material; the carboxyl butyronitrile rubber powder, the nano titanium dioxide and the titanium dioxide are compounded according to the mass portion ratio of 2:2:5 to obtain the powder base material.
According to the mass portion, the 5-7 portions of chain extender base material and 93-95 portions of powder base material are fully stirred and uniformly mixed by an internal mixer, then extrusion granulation is carried out by a double screw extrusion granulator set for low smoke halogen-free material, circulated N2 is adopted for carrying out air cooling granulation, and vacuum is directly carried out after granulationSealing and preserving. In some preferred embodiments, the internal mixer has a stirring speed of 500-700 rpm, a volume of 120L, and a mixing time of 10-15 min, and is filled with a protective gas, which can be N 2 。
The modified chain extender prepared by the method enables the polyester rubber to undergo a chain extension reaction during melt extrusion, so that the melt viscosity and strength of the polyester rubber are improved, and the glass transition temperature and the melting temperature of the polyester rubber can be improved by adding the powder base material. In addition, the titanium dioxide has the functions of reinforcement, aging resistance and filling, so that the polyester rubber material can resist sunlight under the irradiation of sunlight, does not crack or change color, and has improved elongation and acid and alkali resistance.
In some embodiments, an earthquake resistant buffer material for polypropylene insulated cables is prepared by the following method:
adding 60-70 parts by mass of grafted modified polyester rubber, 3.5-9 parts by mass of chain extender, 10-40 parts by mass of flame retardant and 0.3-0.7 part by mass of antioxidant into a stirrer, mixing for 5-8 min under high-speed stirring, adding into a double-screw extruder for extrusion granulation, and drying to obtain modified chain extender chain-extended polyester rubber which is marked as material A;
in some preferred embodiments, the twin screw extruder is 75mm in diameter, 40 in length-to-diameter ratio, 175 rmp-200 rpm in speed, 80-160 ℃ in temperature, and is pelletized by water-cooled riblets and finally dried and air-cooled through a vibrating screen.
Mixing the organic foaming agent Azodicarbonamide (AC), the inorganic foaming agent NaHCO3 and the microsphere foaming agent 950DU according to the mass part ratio of (12-17) to (0.8-1.2) to (0.3-0.6), mixing for 2-3 min under high-speed stirring, sealing, vacuumizing and packaging to obtain the foaming agent, which is denoted as material B.
And respectively placing the prepared material A and the prepared material B in storage bins of two automatic sucking machines, arranging the sucking machines to stably suck the material A and the material B into the storage bins of the extruding machines according to the mass part ratio of 100:13, and extruding the materials through the extruding machines to obtain the anti-vibration buffer material.
Preferably, the package for storing the material B is sealed immediately after the package is unsealed and inserted into the suction pipe, so that the material B is prevented from being directly contacted with air for a long time. Preferably, the extruder head position can be increased by N 2 N2 is used as a protective gas and can also act as a foaming agent during extrusion. The flow of N2 is controlled by the pressure control system and the steam injection needle.
In some embodiments, the shock-resistant buffer material may be used as a jacket for preparing a cable, by:
respectively placing the prepared material A and material B in storage bins of two automatic sucking machines, setting the sucking machines to stably suck the material A and the material B into the storage bins of a sheath extruder according to the mass part ratio of 100:13, wherein the extruder adopts a gradual change screw with the length-diameter ratio of more than or equal to 24:1 and the compression ratio of (2.5-4):1, the temperature of the extruder is set to 160-180 ℃, and the extrusion speed is 2.5-7 m/min; and after extrusion, pre-cooling the cable by a warm water tank with the length of more than or equal to 30m, cooling the cable to room temperature by condensed water, and drying the surface moisture by compressed air to obtain the cable outer sheath.
Preferably, the water temperature of the warm water tank is controlled to be 50-60 ℃, and the pressure of compressed air is controlled to be 0.2-0.5 MPa. The extruder is a phi 150 extruder for extrusion; the extrusion die core dimension D1, the die sleeve dimension D2, the cable core outer diameter D0 and the unfoamed front outer diameter D3 after the polyester rubber is extruded have the following dimensional relationship: (D2) 2 -D1 2 )/(D3 2 -D0 2 ) The numerical value is controlled to be 5-25, and the (D2/D3)/(D1/D0) numerical value is controlled to be 1.03-1.12.
In some embodiments, the sheath prepared from the anti-seismic buffer material can be used as a cable, and the cable sequentially comprises a conductive wire core, a semiconductive conductor shield, an insulating layer, a semiconductive insulating shield, a semiconductive water-blocking buffer layer, a metal shield, a water-blocking buffer layer, a radial water-blocking layer and the sheath from inside to outside.
Preferably, the conductive wire core 1 adopts a class 5 stranded copper conductor specified in GB/T3956-2008, and the nominal sectional area of the conductor is 400mm 2 The conductor structure is: 1*20/0.50+60*32/0.50 (number of central strands per filament/diameter of filament+number of side strands per filament/diameter of filament), 1 layer of semiconducting water-resistant tape of 0.2 x 45 (nominal thickness) for conductor outer lap wrap, average lap ratio of no less than 50%, minimum lap ratio of no less than 45%, conductor can be completed on 630 bundle stranding machine.
The semi-conductive shielding 2 is an extrusion thermoplastic polypropylene semi-conductive shielding material with the brand of PBB-90-35, the nominal thickness of the semi-conductive shielding is 1.0mm, the average thickness is 0.9 mm-1.1 mm, and the thickness of the thinnest point is 0.5mm.
The insulating layer 3 is an extruded thermoplastic polypropylene insulating material with the brand of PP-JC-35, is used for a DC 750V system, has an insulating nominal thickness of 2.5mm, an average thickness of 2.5 mm-3.0 mm and a thinnest point thickness of 2.4mm.
The semi-conductive insulating shield 4 is an extruded thermoplastic polypropylene semi-conductive shielding material with the brand of PKB-90-35, the nominal thickness of the insulating shield is 1.0mm, the average thickness is 0.9 mm-1.1 mm, and the thickness of the thinnest point is 0.50mm.
The semiconductive water-blocking buffer layer 5 is a semiconductive water-blocking tape with 2 layers of 0.3 x 55 (nominal thickness x nominal width) overlapped and wrapped, the average overlap ratio of the semiconductive water-blocking tape is not less than 15%, and the wrapping is completed on a copper tape machine.
The metal shielding 6 is a tinned copper wire braided shielding, the diameter of braided wires is 0.25mm, the braiding density is not lower than 80%, and braiding is completed on a braiding machine.
The water-blocking buffer layer 7 is a double-sided insulation water-blocking tape with 2 layers of 0.35-55 (nominal thickness-nominal width) which are overlapped and wrapped, the overlapping coverage rate of the double-sided insulation water-blocking tape is not less than 15%, and the wrapping is completed on a copper belt machine.
The radial water-resistant layer 8 is a longitudinally-wrapped 1-layer double-sided copper-plastic composite belt, and the size of the copper-plastic composite belt is as follows: and 0.25 x 127 (length x width), wherein the longitudinal wrapping cover width is not less than 5mm, and the longitudinal wrapping is finished by a longitudinal wrapping device arranged in front of the sheath extruder.
The sheath 9 is made of the shock-resistant buffer material.
Preferably, the semiconductive shield 2, the insulating layer 3 and the semiconductive insulating shield 4 are extruded in one step through a PP three-layer coextrusion line. Compared with the traditional three-layer coextrusion technology, the polypropylene three-layer coextrusion technology has the following advantages: (1) The method has the advantages that the cross-linking process is omitted, the energy consumption (carbon emission) in the production process is greatly reduced, and the manufacturing cost can be reduced by 23% -38%; (2) The production period is greatly shortened, and the production period can be shortened by 1/4-1/3; (3) The production of cross-linking byproducts is avoided, the environment-friendly performance is excellent, the regular shutdown cleaning is not needed, the continuous production can be realized, and the production efficiency is effectively improved.
In addition, the radial water-resistant layer 8 is longitudinally wrapped and directly enters the sheath extruding machine head, so that the radial water-resistant layer 8 and the sheath 9 can be completed by one set of working procedures.
The technical scheme of the present application will be further explained below in connection with specific examples.
Example 1:
a cable jacket with an anti-seismic buffer material was prepared by the following method.
S1, preparing a modified chain extender;
15 parts of ethylenediamine and 40 parts of MDI are added into a four-neck flask with a stirrer, a thermometer and a reflux condenser, 25 parts of IBOA is added dropwise through a constant pressure dropping funnel, and the temperature is controlled by adopting ice water bath cooling, so that the reaction temperature is controlled below 25 ℃. After the IBOA is added dropwise, preserving heat for 12 hours at 30-35 ℃ to prepare a chain extender base material;
preparing a powder base material, and compounding carboxyl butyronitrile rubber powder, nano titanium dioxide and titanium dioxide according to the mass portion ratio of 2:2:5 to obtain the powder base material.
According to the mass parts, the 6 parts of chain extender base material and 94 parts of powder base material are fully stirred and uniformly mixed by an internal mixer, and then extrusion granulation is carried out by a double-screw extrusion granulator set through a low-smoke halogen-free material, and the circulation N is adopted 2 And (3) performing air-cooled granulation, preparing the modified chain extender after granulating, and directly vacuumizing, sealing and preserving. The stirring speed of the internal mixer is 700rpm, the volume is 120L, the internal mixing time is 10min, and the internal mixer is filled with N2.
S2, preparing a material A,
adding 60 parts of grafted modified polyester rubber, 3.5 parts of modified chain extender, 10 parts of flame retardant and 0.3 part of antioxidant into a stirrer, mixing for 8min under high-speed stirring, adding into a double-screw extruder for extrusion granulation, wherein the diameter of the double-screw extruder is 75mm, the length-diameter ratio is 40, the rotating speed is 175 rmp-200 rpm, the temperature is set to 80-160 ℃, drying to obtain the polyester rubber chain-extended by the modified chain extender, marking as a material A,
s3, preparing a material B,
mixing an organic foaming agent Azodicarbonamide (AC), an inorganic foaming agent NaHCO3 and a microsphere foaming agent 950DU according to the mass part ratio of 15:1.0:0.5, stirring at a high speed for 3min, sealing, vacuumizing and packaging to obtain the foaming agent, and marking as a material B.
S4, extrusion molding is carried out,
respectively placing the materials A and B prepared by the steps S1 and S2 into storage bins of two automatic sucking machines, arranging the sucking machines to suck the materials A and B into the storage bins of an extruder according to the mass part ratio of 100:13, and extruding the materials through the extruder, wherein the extruder adopts a gradual change screw, the length-diameter ratio is 24:1, the compression ratio is 3:1, the temperature of the extruder is set to 170 ℃, and the extrusion speed is 5m/min; the extruded material is pre-cooled by a warm water tank with the length of 35m and the temperature of 50 ℃, and then cooled to room temperature by condensed water, and then the surface moisture is dried by compressed air, so that the cable outer sheath is obtained.
Example 2:
the cable sheath with the anti-seismic buffer material is prepared in this example, and is different from example 1 only in that 68 parts of the grafted modified polyester rubber, 4.5 parts of the modified chain extender, 29 parts of the flame retardant and 0.35 part of the antioxidant are used in the preparation of the material A.
Comparative example 1:
this comparative example prepares a cable sheath comprising the steps of:
s1, preparing a material A,
adding 60 parts of grafted modified polyester rubber, 10 parts of flame retardant and 0.3 part of antioxidant into a stirrer, mixing for 8min under high-speed stirring, adding into a double-screw extruder for extrusion granulation, wherein the diameter of the double-screw extruder is 75mm, the length-diameter ratio is 40, the rotating speed is 175 rmp-200 rpm, the temperature is set at 80-160 ℃, the modified polyester rubber is obtained after drying, and is marked as material A,
s2, preparing a material B,
azodicarbonamide (AC) as organic foaming agent and NaHCO as inorganic foaming agent 3 And microsphere foaming agent 950DU are mixed according to the mass portion ratio of 15:1.0:0.5, mixed for 3min under high-speed stirring, and then sealed and vacuumized and packaged to obtain the foaming agent which is denoted as material B.
S3, extrusion molding is carried out,
respectively placing the materials A and B prepared by the steps S1 and S2 into storage bins of two automatic sucking machines, arranging the sucking machines to suck the materials A and B into the storage bins of an extruder according to the mass part ratio of 100:13, and extruding the materials through the extruder, wherein the extruder adopts a gradual change screw, the length-diameter ratio is 24:1, the compression ratio is 3:1, the temperature of the extruder is set to 170 ℃, and the extrusion speed is 5m/min; the extruded material is pre-cooled by a warm water tank with the length of 35m and the temperature of 50 ℃, and then cooled to room temperature by condensed water, and then the surface moisture is dried by compressed air, so that the cable outer sheath is obtained.
Comparative example 2:
this comparative example produces a cable jacket that differs from example 1 only in that the modified chain extender used in example 1 is replaced with ethylenediamine.
Performance detection experiment:
the cable jackets with the anti-seismic buffer materials prepared in example 1 and example 2 were used as samples, the cable jackets prepared in comparative example 1 and comparative example 2 were used as control substances, various performance indexes of all the samples and the control substances were tested, whether all the samples and the control substances meet the actual use requirements or not was judged, and the test results are shown in the following table 1.
TABLE 1 Performance test results
As can be seen from the comparison data in Table 1, when the anti-seismic buffer material for polypropylene insulated cable prepared by the application is used in a cable sheath, the performances of density, tensile strength, tearing strength, breaking elongation and the like are far better than those of the cable sheath (comparative example 1) without adding the chain extender and the cable sheath prepared by adding the traditional chain extender ethylenediamine (comparative example 2). As can be seen from the table, when the anti-seismic buffer material for the polypropylene insulated cable is used in the cable sheath, the density of the anti-seismic buffer material is low, which indicates that the prepared cable sheath is lighter; the tensile strength is high, and the prepared cable sheath has high strength performance; the tearing strength and the breaking growth rate are large, and the prepared cable sheath has high toughness. Therefore, the anti-seismic buffer material for the polypropylene insulated cable, which is prepared by the application, has higher anti-seismic buffer performance when being used in a cable sheath.
In addition, when the anti-seismic buffer material for the polypropylene insulated cable prepared by the application is used in a cable sheath, the wear-resistant times and the Shore hardness of the anti-seismic buffer material are obviously larger than those of the cable sheath (comparative example 1) without adding the chain extender and the cable sheath prepared by adding the traditional chain extender ethylenediamine (comparative example 2), so that the service life of the cable sheath can be prolonged when the anti-seismic buffer material for the polypropylene insulated cable prepared by the application is used as the cable sheath.
The foregoing embodiments are, of course, preferred embodiments of the present application, and are intended to be merely illustrative of the technical spirit and features of the present application, and not to limit the scope of the present application in any way, since those skilled in the art will be able to understand the present application and implement it accordingly. All modifications made according to the spirit of the main technical proposal of the application should be covered in the protection scope of the application.
Claims (16)
1. The shock-resistant buffer material for the polypropylene insulated cable is characterized by comprising the following raw materials in parts by weight:
60-70 parts of graft modified polyester rubber
3.5 to 9 portions of modified chain extender
8-15 parts of foaming agent
The modified chain extender is a mixture of a chain extender base material and a powder base material, and acts on the grafted modified polyester rubber to cause the grafted modified polyester rubber to undergo a chain extension reaction.
2. An earthquake-resistant buffering material for a polypropylene insulated cable according to claim 1, further comprising:
10 to 40 portions of flame retardant
0.3 to 0.7 portion of antioxidant.
3. The shock-resistant buffer material for the polypropylene insulated cable according to claim 1, wherein the chain extender base material comprises the following raw materials in parts by weight:
15-20 parts of ethylenediamine
40-60 parts of diphenylmethane diisocyanate
25-40 parts of isobornyl acrylate
The ethylenediamine, the diphenylmethane diisocyanate and the isobornyl acrylate undergo a Michael addition reaction.
4. A shock-resistant buffer material for polypropylene insulated cables according to claim 3, wherein said powder base comprises a mixture of one or more of carboxylated nitrile rubber powder, nano titanium dioxide and titanium dioxide.
5. The shock-resistant buffer material for the polypropylene insulated cable according to claim 4, wherein the powder base material is a mixture of carboxyl butyronitrile rubber powder, nano titanium dioxide and titanium dioxide in a mass ratio of 2:2:5.
6. The shock-resistant buffer material for polypropylene insulated cable according to claim 5, wherein the graft modified polyester rubber is synthesized by an auxiliary agent and a polyester elastomer, the auxiliary agent being one of polytetrahydrofuran ether (PTMG), dimethyl terephthalate (DMT) and 1, 4-butanediol (1, 4-BD).
7. The shock-resistant buffering material for polypropylene insulated cables according to claim 6, wherein the flame retardant is a halogen-free flame retardant which is a mixture of one or more of melamine cyanurate, melamine pyrophosphate, pentaerythritol, nano montmorillonite and expandable graphite.
8. The shock-resistant buffering material for a polypropylene insulated cable according to claim 7, wherein the antioxidant is one or a mixture of more of antioxidant 1010, antioxidant 1098, antioxidant 168, or antioxidant 619F.
9. The shock-resistant buffer material for polypropylene insulated cable according to claim 8, wherein the foaming agent comprises an organic foaming agent Azodicarbonamide (AC), an inorganic foaming agent NaHCO 3 And microsphere blowing agent 950DU.
10. A method for preparing an earthquake-resistant buffering material for polypropylene insulated cable according to any one of claims 1 to 9, comprising the steps of:
mixing a chain extender base material and a powder base material to obtain a modified chain extender;
mixing the grafted modified polyester rubber and a modified chain extender, and carrying out chain extension on the grafted modified polyester rubber;
and mixing the grafted modified polyester rubber after chain extension with a foaming agent, and extruding and forming to obtain the anti-seismic buffer material.
11. The method for preparing an anti-vibration buffer material for a polypropylene insulated cable according to claim 10, wherein a flame retardant and an antioxidant are further added when the graft modified polyester rubber is chain-extended.
12. The preparation method of the shock-resistant buffer material for the polypropylene insulated cable according to claim 11, wherein the grafted modified polyester rubber after chain extension and the foaming agent are mixed and extruded according to the mass ratio of 100:13.
13. The method for producing an earthquake-resistant buffering material for polypropylene insulated cables according to claim 12, wherein the extruder head is increased by N during extrusion molding 2 And an air injection system.
14. Use of an earthquake-resistant buffer material for polypropylene insulated cables according to any one of claims 1-9 in cables, comprising the steps of:
mixing a chain extender base material and a powder base material to obtain a modified chain extender;
mixing the grafted modified polyester rubber and a modified chain extender, and carrying out chain extension on the grafted modified polyester rubber;
mixing the grafted modified polyester rubber after chain extension with a foaming agent, and extruding the mixture through a sheath extruder;
and cooling the extruded sheath to room temperature, and drying the surface moisture to obtain the cable sheath.
15. The use of an earthquake-resistant buffer material for polypropylene insulated cables in cable jackets according to claim 14, characterized in that the cable further comprises a cable core, a semiconductive conductor shield, an insulation layer, a semiconductive insulation shield, a semiconductive water-blocking buffer layer, a metal shield, a water-blocking buffer layer and a radial water-blocking layer.
16. Use of an earthquake-resistant buffer material for polypropylene insulated cables in cable jackets according to claim 15, characterized in that the semiconductive shield, the insulating layer and the semiconductive insulating shield are extruded once by means of a polypropylene three-layer coextrusion technique.
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