CN115232405A - Cold-resistant elastomer material and preparation method thereof - Google Patents
Cold-resistant elastomer material and preparation method thereof Download PDFInfo
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- CN115232405A CN115232405A CN202211108125.7A CN202211108125A CN115232405A CN 115232405 A CN115232405 A CN 115232405A CN 202211108125 A CN202211108125 A CN 202211108125A CN 115232405 A CN115232405 A CN 115232405A
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- 239000000463 material Substances 0.000 title claims abstract description 41
- 229920001971 elastomer Polymers 0.000 title claims abstract description 32
- 239000000806 elastomer Substances 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- -1 polypropylene Polymers 0.000 claims abstract description 77
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 51
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 51
- 239000000843 powder Substances 0.000 claims abstract description 43
- 229920001577 copolymer Polymers 0.000 claims abstract description 23
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 10
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 10
- 239000000314 lubricant Substances 0.000 claims abstract description 10
- 239000004743 Polypropylene Substances 0.000 claims abstract description 9
- 229920001903 high density polyethylene Polymers 0.000 claims abstract description 9
- 239000004700 high-density polyethylene Substances 0.000 claims abstract description 9
- 229920001155 polypropylene Polymers 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 9
- KWKAKUADMBZCLK-UHFFFAOYSA-N 1-octene Chemical compound CCCCCCC=C KWKAKUADMBZCLK-UHFFFAOYSA-N 0.000 claims description 52
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 42
- TVMXDCGIABBOFY-UHFFFAOYSA-N n-Octanol Natural products CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 claims description 26
- 238000006243 chemical reaction Methods 0.000 claims description 18
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 16
- 125000000816 ethylene group Chemical group [H]C([H])([*:1])C([H])([H])[*:2] 0.000 claims description 16
- CNHDIAIOKMXOLK-UHFFFAOYSA-N toluquinol Chemical compound CC1=CC(O)=CC=C1O CNHDIAIOKMXOLK-UHFFFAOYSA-N 0.000 claims description 12
- 238000001125 extrusion Methods 0.000 claims description 10
- 229920002554 vinyl polymer Polymers 0.000 claims description 10
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 8
- 238000007334 copolymerization reaction Methods 0.000 claims description 7
- 238000006116 polymerization reaction Methods 0.000 claims description 7
- KOMDZQSPRDYARS-UHFFFAOYSA-N cyclopenta-1,3-diene titanium Chemical compound [Ti].C1C=CC=C1.C1C=CC=C1 KOMDZQSPRDYARS-UHFFFAOYSA-N 0.000 claims description 6
- NWVVVBRKAWDGAB-UHFFFAOYSA-N hydroquinone methyl ether Natural products COC1=CC=C(O)C=C1 NWVVVBRKAWDGAB-UHFFFAOYSA-N 0.000 claims description 6
- 239000003112 inhibitor Substances 0.000 claims description 6
- JLTRXTDYQLMHGR-UHFFFAOYSA-N trimethylaluminium Chemical compound C[Al](C)C JLTRXTDYQLMHGR-UHFFFAOYSA-N 0.000 claims description 6
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 5
- 239000005977 Ethylene Substances 0.000 claims description 5
- 238000005469 granulation Methods 0.000 claims description 5
- 230000003179 granulation Effects 0.000 claims description 5
- 238000012719 thermal polymerization Methods 0.000 claims description 5
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 239000002904 solvent Substances 0.000 claims description 4
- 239000000725 suspension Substances 0.000 claims description 4
- 239000008096 xylene Substances 0.000 claims description 4
- 239000003054 catalyst Substances 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims description 2
- 239000013536 elastomeric material Substances 0.000 claims 8
- 239000002131 composite material Substances 0.000 abstract description 10
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 abstract description 6
- 239000004698 Polyethylene Substances 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 229920000573 polyethylene Polymers 0.000 abstract description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 12
- 238000012360 testing method Methods 0.000 description 12
- 238000002156 mixing Methods 0.000 description 9
- 238000010438 heat treatment Methods 0.000 description 7
- 238000003756 stirring Methods 0.000 description 7
- 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 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 description 4
- 238000004378 air conditioning Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 230000001678 irradiating effect Effects 0.000 description 4
- HQKMJHAJHXVSDF-UHFFFAOYSA-L magnesium stearate Chemical compound [Mg+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O HQKMJHAJHXVSDF-UHFFFAOYSA-L 0.000 description 4
- 238000005303 weighing Methods 0.000 description 4
- 239000004721 Polyphenylene oxide Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 description 3
- 239000012065 filter cake Substances 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 238000000227 grinding Methods 0.000 description 3
- 229920000570 polyether Polymers 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000007792 addition Methods 0.000 description 2
- 150000001336 alkenes Chemical class 0.000 description 2
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 description 2
- 239000008116 calcium stearate Substances 0.000 description 2
- 235000013539 calcium stearate Nutrition 0.000 description 2
- 239000013013 elastic material Substances 0.000 description 2
- 235000019359 magnesium stearate Nutrition 0.000 description 2
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 2
- 239000012188 paraffin wax Substances 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 239000003320 cold-resistant material Substances 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 230000005251 gamma ray Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 201000009240 nasopharyngitis Diseases 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 150000003673 urethanes Chemical class 0.000 description 1
- 238000009941 weaving Methods 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
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/062—HDPE
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
Abstract
The invention relates to a cold-resistant elastomer material and a preparation method thereof, wherein the cold-resistant elastomer material comprises the following raw materials in parts by weight: 50-75 parts of polypropylene, 25-40 parts of high-density polyethylene, 8-14 parts of ethylene-propylene copolymer, 10-25 parts of modified polytetrafluoroethylene micro powder, 0.1-3 parts of antioxidant and 0.1-3 parts of lubricant. The modified polytetrafluoroethylene micro powder is connected with the side octyl and the side siloxane chain on the surface, the side siloxane chain enables the polytetrafluoroethylene micro powder to be uniformly dispersed in the base materials of polypropylene and polyethylene, the flexible chain curling structural characteristic of the side octyl is exerted due to the introduction of the side octyl, the toughening effect is realized on the composite material, and the cold resistance of the composite material is improved, so that the introduction of the modified polytetrafluoroethylene micro powder not only improves the cold resistance of the composite material, but also improves the wear resistance of the composite material.
Description
Technical Field
The invention belongs to the technical field of materials for protective sleeves, and particularly relates to a cold-resistant elastomer material and a preparation method thereof.
Background
The electric automobile is rapidly developed due to the characteristic of no exhaust emission in the use process, and the charging cable belongs to an important component which cannot be lost in the electric automobile. Charging cables are different from cables in other fields, and are frequently dragged and twisted in use, rubbed on the ground or mechanical equipment, and the damage and damage to the cables are aggravated in outdoor cold use environments, so that the requirements on cold resistance and wear resistance of the materials of the sheath of the charging cables are particularly high.
A low temperature charging cable for electric automobile as chinese patent CN201720623820.5 discloses, including the cable body, cable body one end is provided with power plug, the cable body other end is provided with car end plug, the cable body comprises the unit cable, peg graft through first joint and second joint between the unit cable, the cable body includes neutral core, earth core, signal core, the sinle silk that charges, band, inner sheath, galvanized steel wire weaving layer, heat preservation, armor steel band and cold-resistant overcoat layer. Through setting up cold-resistant oversheath in this patent, strengthened the cold-resistant ability of cable, and cold-resistant overcoat layer sets up to polyether polyurethane layer. However, polyether urethanes are too flexible, have poor mechanical properties and poor abrasion resistance, and are not suitable for use in charging cables. Compared with polyether polyurethane, olefin elastomers have good low-temperature elasticity and good wear resistance, and particularly high-density polyethylene is a common cold-resistant material. Therefore, the olefin elastomer is adopted as the base material, and is modified in a chemical and physical mode through external feeding, so that the composite material with good low-temperature toughness and wear resistance is obtained, and the use requirement of the charging cable is met.
Disclosure of Invention
The invention aims to provide a cold-resistant elastomer material and a preparation method thereof.
The technical problems to be solved by the invention are as follows: the problem of present charging cable protective sleeve material cold resistance, wearability not enough is solved.
The purpose of the invention can be realized by the following technical scheme:
the cold-resistant elastomer material comprises the following raw materials in parts by weight: 50-75 parts of polypropylene, 25-40 parts of high-density polyethylene, 8-14 parts of ethylene-propylene copolymer, 10-25 parts of modified polytetrafluoroethylene micro powder, 0.1-3 parts of antioxidant and 0.1-3 parts of lubricant.
Further, the antioxidant is formed by mixing the antioxidant 1010 and the antioxidant 168 according to any ratio.
Further, the lubricant is one or a mixture of several of calcium stearate, magnesium stearate, white oil and paraffin in any ratio.
Further, the modified polytetrafluoroethylene micro powder is obtained by carrying out thermal polymerization on the irradiated polytetrafluoroethylene micro powder, a copolymer of modified ethylene and 1-octene and sulfuric acid. In the reaction, the characteristics of numerous free radicals and peroxides in the irradiated polytetrafluoroethylene micro powder are utilized, the reaction is easy to occur with free double bonds in the copolymer of modified ethylene and 1-octene, so that the surface of the polytetrafluoroethylene micro powder is connected with side octyl and side siloxane chains, wherein the side siloxane chains enable the polytetrafluoroethylene micro powder to be uniformly dispersed in the composite base material of polypropylene and polyethylene, meanwhile, the side siloxane chains also improve the wettability of the polytetrafluoroethylene micro powder and improve the mixing processability of the modified polytetrafluoroethylene micro powder and other raw materials, the introduction of the side octyl groups plays a role in realizing the flexible chain curling structural characteristic of the side octyl groups and has a toughening effect on the composite material (especially improving the low-temperature impact resistance of the composite material, namely improving the cold resistance of the composite material).
Furthermore, the mass ratio of the polytetrafluoroethylene micro powder subjected to irradiation treatment, the copolymer of modified ethylene and 1-octene and sulfuric acid is 15-20.
Further, the thermal polymerization reaction conditions: toluene is used as a solvent to prepare suspension, the suspension is stirred, the reaction temperature is 65-70 ℃, the reaction time is 3-5h, and the adding mass of the toluene is 1.5-3 times of the total mass of the polytetrafluoroethylene micro powder and the copolymer of the modified ethylene and the 1-octene.
Furthermore, a polymerization inhibitor is added in the preparation process of the modified polytetrafluoroethylene micro powder, so that the polymerization of the irradiation-treated polytetrafluoroethylene micro powder can be well prevented, the grafting efficiency of the irradiation-treated polytetrafluoroethylene micro powder is improved, the addition mass of the polymerization inhibitor is 1-3% of the mass of the irradiation-treated polytetrafluoroethylene micro powder, and the polymerization inhibitor is one of hydroquinone and methyl hydroquinone.
Furthermore, the polytetrafluoroethylene micro powder subjected to the irradiation treatment is prepared by the steps of carrying out the following steps of, 60 the polytetrafluoroethylene micro powder is obtained by Co source gamma ray irradiation treatment, and the irradiation dose is 50-60kGy.
Further, the copolymer of modified ethylene and 1-octene is synthesized by introducing vinyl siloxane in the copolymerization reaction process of ethylene and 1-octene and carrying out copolymerization reaction. The copolymerization reaction is carried out in a reaction kettle by taking toluene or xylene as a solvent, titanocene as a catalyst and trimethylaluminum as a cocatalyst for 3-4h at 100-115 ℃ and 1.5-1.7 MPa.
Further, the copolymerization reaction comprises the following steps:
injecting toluene or xylene, 1-octene, vinyl siloxane and trimethylaluminum into a high-pressure reaction kettle, stirring and heating to 100-115 ℃, then injecting toluene or xylene containing titanocene, finally injecting ethylene and pressurizing to 1.5-1.7MPa, preserving heat and maintaining pressure for reaction for 3-4h, relieving pressure to normal pressure, terminating the reaction by using acidified ethanol, filtering, collecting a filter cake, washing by using ethanol and water, and drying to obtain the copolymer of modified ethylene and 1-octene.
Further, the mass ratio of the 1-octene to the vinyl siloxane is 75-90.
Further, the added mass of the trimethylaluminum is 1 to 1.5 percent of the total mass of the 1-octene and the vinyl siloxane.
Further, the adding mass of the titanocene is 1.2-1.8% of the total mass of the 1-octene and the vinyl siloxane.
The preparation method of the cold-resistant elastomer material comprises the following steps:
and adding the raw materials of the cold-resistant elastomer material into a double-screw extruder, and performing extrusion granulation to obtain the cold-resistant elastomer material. The extrusion temperature is set to be 5 temperature zones, and the temperature is respectively set to be 130-140 ℃,145-155 ℃,160-170 ℃,170-175 ℃ and 160-165 ℃.
The invention has the beneficial effects that:
in order to solve the problems in the prior art, the invention adopts polypropylene and high-density polyethylene as the base materials of the cold-resistant elastomer material, utilizes the good cold resistance of the high-density polyethylene, and simultaneously introduces the ethylene-propylene copolymer to improve the compatibility between the two base materials and improve the processing performance of the base materials. Meanwhile, in order to improve the wear resistance of the cold-resistant elastomer material, the invention utilizes the excellent wear resistance of the polytetrafluoroethylene micropowder, and simultaneously avoids the reduction of the elastic property of the composite material caused by the introduction of the polytetrafluoroethylene micropowder.
In conclusion, the cold-resistant elastomer material provided by the invention has good cold resistance and wear resistance.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Preparation of a copolymer of modified ethylene and 1-octene:
injecting 170mL of toluene, 75g of 1-octene, 10g of vinyl siloxane (vinyl triethoxysilane) and 1g of trimethylaluminum into a high-pressure reaction kettle, stirring and heating to 100 ℃, then injecting 10mL of toluene containing 1.3g of titanocene, finally injecting ethylene, pressurizing to 1.5MPa, keeping the temperature and maintaining the pressure for reaction for 4 hours, relieving the pressure to normal pressure, terminating the reaction by acidified ethanol, filtering, collecting a filter cake, washing by ethanol and water, and drying to obtain the copolymer of modified ethylene and 1-octene.
Example 2
Preparation of a copolymer of modified ethylene and 1-octene:
injecting 170mL of dimethylbenzene, 90g of 1-octene, 20g of vinyl siloxane (vinyl triethoxysilane) and 1.5g of trimethylaluminum into a high-pressure reaction kettle, stirring and heating to 115 ℃, then injecting 10mL of dimethylbenzene containing 1.8g of titanocene, finally injecting ethylene and pressurizing to 1.5MPa, keeping the temperature and the pressure for reaction for 3 hours, relieving the pressure to normal pressure, terminating the reaction by acidified ethanol, filtering, collecting a filter cake, washing by ethanol and water, and drying to obtain the copolymer of modified ethylene and 1-octene.
Example 3
Preparing modified polytetrafluoroethylene micro powder:
in the state of air, the air-conditioning system, 60 and (2) irradiating 15g of polytetrafluoroethylene micro powder by using Co source gamma rays, wherein the irradiation dose is 50kGy, obtaining 15g of irradiated polytetrafluoroethylene micro powder, uniformly mixing 15g of irradiated polytetrafluoroethylene micro powder, 4g of the copolymer of modified ethylene and 1-octene prepared in example 1 and 40g of toluene, adding 0.5g of sulfuric acid and 0.15g of methyl hydroquinone, stirring, heating to 65 ℃, and reacting for 5 hours.
Example 4
Preparing modified polytetrafluoroethylene micro powder:
in the air state, the air-conditioning system, 60 and (2) irradiating 20g of polytetrafluoroethylene micro powder by using Co source gamma rays, wherein the irradiation dose is 60kGy, obtaining 20g of irradiated polytetrafluoroethylene micro powder, uniformly mixing 20g of irradiated polytetrafluoroethylene micro powder, 5.5g of the copolymer of modified ethylene and 1-octene prepared in the example 2 and 85g of toluene, adding 2g of sulfuric acid and 0.6g of methyl hydroquinone, stirring, heating to 70 ℃, and reacting for 3 hours.
Example 5
Preparation of cold-resistant elastomer material:
the preparation method comprises the following steps of: 50 parts of polypropylene, 40 parts of high-density polyethylene, 8 parts of ethylene-propylene copolymer, 10 parts of modified polytetrafluoroethylene micro powder prepared in example 3, 0.1 part of antioxidant and 0.1 part of lubricant; the antioxidant is formed by mixing an antioxidant 1010 and an antioxidant 168 according to a mass ratio of 2; the lubricant is calcium stearate;
and step two, adding the raw materials of the cold-resistant elastomer material into a double-screw extruder, and performing extrusion granulation to obtain the cold-resistant elastomer material. The extrusion temperature is set to 5 temperature zones, which are respectively 130 ℃,145 ℃,160 ℃,170 ℃ and 160 ℃.
Example 6
Preparation of cold-resistant elastomer material:
the preparation method comprises the following steps of: 65 parts of polypropylene, 30 parts of high-density polyethylene, 12 parts of ethylene-propylene copolymer, 18 parts of modified polytetrafluoroethylene micro powder prepared in example 3, 1.2 parts of antioxidant and 1.6 parts of lubricant; the antioxidant is formed by mixing an antioxidant 1010 and an antioxidant 168 according to a mass ratio of 1; the lubricant is magnesium stearate;
and step two, adding the raw materials of the cold-resistant elastomer material into a double-screw extruder, and performing extrusion granulation to obtain the cold-resistant elastomer material. The extrusion temperature was set to 5 temperature zones, 135 ℃,150 ℃,165 ℃,170 ℃,165 ℃.
Example 7
Preparation of cold-resistant elastomer material:
the preparation method comprises the following steps of: 75 parts of polypropylene, 25 parts of high-density polyethylene, 14 parts of ethylene-propylene copolymer, 25 parts of modified polytetrafluoroethylene micro powder prepared in example 3, 3 parts of antioxidant and 3 parts of lubricant; the antioxidant is formed by mixing an antioxidant 1010 and an antioxidant 168 according to a mass ratio of 1; the lubricant is paraffin;
and step two, adding the raw materials of the cold-resistant elastomer material into a double-screw extruder, and performing extrusion granulation to obtain the cold-resistant elastomer material. The extrusion temperature was set to 5 temperature zones, 140 deg.C, 155 deg.C, 170 deg.C, 175 deg.C, 165 deg.C, respectively.
Comparative example 1
Preparation of cold-resistant elastomer material: compared with the example 5, the modified polytetrafluoroethylene micropowder is replaced by polytetrafluoroethylene micropowder in equal parts, and the rest is the same.
Comparative example 2
Preparation of cold-resistant elastomer material: compared with the embodiment 6, the modified polytetrafluoroethylene micropowder prepared by the following steps is replaced by the modified polytetrafluoroethylene micropowder with the same amount, and the rest are the same:
in the state of air, the air-conditioning system, 60 and (2) irradiating 15g of polytetrafluoroethylene micro powder by using Co source gamma rays, wherein the irradiation dose is 50kGy, obtaining 15g of irradiated polytetrafluoroethylene micro powder, uniformly mixing 15g of irradiated polytetrafluoroethylene micro powder, 4g of vinyl siloxane (vinyl triethoxysilane) and 40g of toluene, adding 0.5g of sulfuric acid and 0.15g of methyl hydroquinone, stirring, heating to 65 ℃, and reacting for 5 hours.
Comparative example 3
Preparation of cold-resistant elastomer material: compared with the embodiment 7, the modified polytetrafluoroethylene micropowder prepared by the following steps is replaced by the modified polytetrafluoroethylene micropowder with the same amount, and the rest are the same:
in the air state, the air-conditioning system, 60 and (2) irradiating 20g of polytetrafluoroethylene micro powder by using Co source gamma rays, wherein the irradiation dose is 60kGy, obtaining 20g of irradiated polytetrafluoroethylene micro powder, uniformly mixing 20g of irradiated polytetrafluoroethylene micro powder, 5.5g of 1-octene and 85g of toluene, adding 2g of sulfuric acid and 0.6g of methyl hydroquinone, stirring, heating to 70 ℃, and reacting for 3 hours.
Example 8
Examples 5 to 7 and comparative examples 1 to 3 were subjected to performance tests, and the results are shown in Table 1.
Wear loss: extruding the cold-resistant elastic material into a strip shape, cutting the strip into samples of 6cm multiplied by 2.5cm multiplied by 1.5, weighing and weighing m0, then using the samples in a wear test, brushing floating scraps with a brush after the test is finished, weighing and weighing m1, wherein the rotation speed of a grinding wheel (a grinding disc) is 1000r/min, the test time is 5min, the surface granularity of the grinding wheel is 60#, the load is 800g, each sample is tested for 3 times, the average value is taken, the wear loss is calculated according to the following formula, and the wear loss is = (m 0-m 1)/5.
Hardness: testing according to GB/T531.1, wherein the testing conditions are as follows: 15s.
Low temperature embrittlement performance: according to the test of GB/T5470, the test conditions are as follows: -40 ℃ for 3min.
Thermal shock performance: testing according to GB/T29571.31, wherein the testing conditions are as follows: 150 ℃ and 1h.
Tensile strength and elongation at break: according to GB/T528, test conditions: 200mm/min.
Tear strength: test according to GB/T529, test conditions: 200mm/min.
TABLE 1
As can be seen from the data in Table 1, the cold-resistant elastic materials obtained in examples 5 to 7 have good elasticity, cold resistance and wear resistance.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.
Claims (10)
1. A cold-resistant elastomer material is characterized in that: the feed comprises the following raw materials in parts by weight: 50-75 parts of polypropylene, 25-40 parts of high-density polyethylene, 8-14 parts of ethylene-propylene copolymer, 10-25 parts of modified polytetrafluoroethylene micro powder, 0.1-3 parts of antioxidant and 0.1-3 parts of lubricant;
the modified polytetrafluoroethylene micro powder is obtained by performing thermal polymerization on irradiated polytetrafluoroethylene micro powder, a copolymer of modified ethylene and 1-octene and sulfuric acid.
2. A cold-resistant elastomeric material according to claim 1, characterized in that: the mass ratio of the polytetrafluoroethylene micro powder subjected to irradiation treatment to the copolymer of modified ethylene and 1-octene to sulfuric acid is (15-20).
3. A cold-resistant elastomeric material according to claim 1, characterized in that: the thermal polymerization reaction conditions are as follows: toluene is used as a solvent to prepare suspension, the suspension is stirred, the reaction temperature is 65-70 ℃, the reaction time is 3-5h, and the adding mass of the toluene is 1.5-3 times of the total mass of the polytetrafluoroethylene micro powder and the copolymer of the modified ethylene and the 1-octene.
4. A cold-resistant elastomeric material according to claim 1, characterized in that: and adding a polymerization inhibitor in the thermal polymerization reaction.
5. A cold-resistant elastomeric material according to claim 4, characterized in that: the adding mass of the polymerization inhibitor is 1-3% of the mass of the irradiated polytetrafluoroethylene micro powder.
6. A cold-resistant elastomeric material according to claim 4, characterized in that: the polymerization inhibitor is one of hydroquinone and methyl hydroquinone.
7. A cold-resistant elastomeric material according to claim 1, characterized in that: the copolymer of the modified ethylene and the 1-octene is synthesized by introducing vinyl siloxane in the copolymerization reaction process of the ethylene and the 1-octene and carrying out copolymerization reaction.
8. A cold-resistant elastomeric material according to claim 7, characterized in that: the copolymerization reaction conditions are as follows: toluene or xylene is used as a solvent, titanocene is used as a catalyst, trimethylaluminum is used as a cocatalyst, and the reaction is carried out for 3 to 4 hours at the temperature of between 100 and 115 ℃ and under the pressure of between 1.5 and 1.7 MPa.
9. A cold-resistant elastomeric material according to claim 8, characterized in that: the mass ratio of the 1-octene to the vinyl siloxane is 75-90.
10. The preparation method of the cold-resistant elastomer material as claimed in claim 1, wherein the cold-resistant elastomer material comprises the following steps: the method comprises the following steps:
adding the raw materials of the cold-resistant elastomer material into a double-screw extruder, and performing extrusion granulation to obtain the cold-resistant elastomer material, wherein the extrusion temperature is set to be 5 temperature zones, and the temperature is respectively set to be 130-140 ℃,145-155 ℃,160-170 ℃,170-175 ℃ and 160-165 ℃.
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| CN103289207A (en) * | 2012-02-23 | 2013-09-11 | 合肥杰事杰新材料股份有限公司 | Bending-resistant white polypropylene material and preparation method thereof |
| CN104558856A (en) * | 2014-12-22 | 2015-04-29 | 浙江普利特新材料有限公司 | Creep-resistant low-temperature-impact-resistant polypropylene composition and preparation method thereof |
| CN104592623A (en) * | 2013-10-31 | 2015-05-06 | 天津美亚化工有限公司 | Low temperature resistant polypropylene material and preparation method thereof |
| CN104877237A (en) * | 2015-06-19 | 2015-09-02 | 合肥工业大学 | Polypropylene composite materials, preparation method and application |
| CN112662052A (en) * | 2020-11-26 | 2021-04-16 | 浙江科赛新材料科技有限公司 | Polypropylene modified material and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103289207A (en) * | 2012-02-23 | 2013-09-11 | 合肥杰事杰新材料股份有限公司 | Bending-resistant white polypropylene material and preparation method thereof |
| CN104592623A (en) * | 2013-10-31 | 2015-05-06 | 天津美亚化工有限公司 | Low temperature resistant polypropylene material and preparation method thereof |
| CN104558856A (en) * | 2014-12-22 | 2015-04-29 | 浙江普利特新材料有限公司 | Creep-resistant low-temperature-impact-resistant polypropylene composition and preparation method thereof |
| CN104877237A (en) * | 2015-06-19 | 2015-09-02 | 合肥工业大学 | Polypropylene composite materials, preparation method and application |
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