CN116589806A - Novel polyvinyl chloride composite material and preparation method thereof - Google Patents
Novel polyvinyl chloride composite material and preparation method thereof Download PDFInfo
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- CN116589806A CN116589806A CN202310727021.2A CN202310727021A CN116589806A CN 116589806 A CN116589806 A CN 116589806A CN 202310727021 A CN202310727021 A CN 202310727021A CN 116589806 A CN116589806 A CN 116589806A
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- polyvinyl chloride
- parts
- nitrile rubber
- composite material
- mixing
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- 239000004800 polyvinyl chloride Substances 0.000 title claims abstract description 48
- 229920000915 polyvinyl chloride Polymers 0.000 title claims abstract description 48
- 239000002131 composite material Substances 0.000 title claims abstract description 26
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 229920000459 Nitrile rubber Polymers 0.000 claims abstract description 51
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000011347 resin Substances 0.000 claims abstract description 18
- 229920005989 resin Polymers 0.000 claims abstract description 18
- 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 abstract description 12
- GSXJAPJSIVGONK-UHFFFAOYSA-N chloro-ethenyl-methyl-phenylsilane Chemical compound C=C[Si](Cl)(C)C1=CC=CC=C1 GSXJAPJSIVGONK-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000003063 flame retardant Substances 0.000 claims abstract description 12
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 239000004709 Chlorinated polyethylene Substances 0.000 claims abstract description 9
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 claims abstract description 9
- SHLNMHIRQGRGOL-UHFFFAOYSA-N barium zinc Chemical compound [Zn].[Ba] SHLNMHIRQGRGOL-UHFFFAOYSA-N 0.000 claims abstract description 9
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000012760 heat stabilizer Substances 0.000 claims abstract description 9
- 238000002156 mixing Methods 0.000 claims description 28
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 8
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 229920001971 elastomer Polymers 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- 239000005060 rubber Substances 0.000 claims description 6
- 238000007873 sieving Methods 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 2
- 229910000410 antimony oxide Inorganic materials 0.000 claims description 2
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 2
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 2
- 239000000347 magnesium hydroxide Substances 0.000 claims description 2
- VTRUBDSFZJNXHI-UHFFFAOYSA-N oxoantimony Chemical compound [Sb]=O VTRUBDSFZJNXHI-UHFFFAOYSA-N 0.000 claims description 2
- BIKXLKXABVUSMH-UHFFFAOYSA-N trizinc;diborate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]B([O-])[O-].[O-]B([O-])[O-] BIKXLKXABVUSMH-UHFFFAOYSA-N 0.000 claims description 2
- 239000003999 initiator Substances 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 5
- 239000000178 monomer Substances 0.000 abstract description 3
- 239000002861 polymer material Substances 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 12
- 239000004014 plasticizer Substances 0.000 description 6
- 229920013716 polyethylene resin Polymers 0.000 description 6
- 239000003566 sealing material Substances 0.000 description 6
- 239000006087 Silane Coupling Agent Substances 0.000 description 5
- 230000004913 activation Effects 0.000 description 5
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 4
- 229910052709 silver Inorganic materials 0.000 description 4
- 239000004332 silver Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000007822 coupling agent Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000006467 substitution reaction 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
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08L27/06—Homopolymers or copolymers of vinyl chloride
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F279/00—Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as defined in group C08F36/00
- C08F279/02—Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as defined in group C08F36/00 on to polymers of conjugated dienes
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a novel polyvinyl chloride composite material and a preparation method thereof, which belong to the technical field of high polymer materials and comprise the following raw materials in parts by weight: 90-100 parts of polyvinyl chloride resin, 8-12 parts of chlorinated polyethylene, 65-70 parts of dioctyl phthalate, 8-12 parts of modified nitrile rubber, 10-20 parts of flame retardant and 1-4 parts of barium zinc heat stabilizer; the modified nitrile rubber is prepared by grafting nitrile rubber by taking methyl phenyl vinyl chlorosilane as a grafting monomer, styrene as a comonomer and dicumyl peroxide as an initiator. According to the invention, the polyvinyl chloride resin is adopted as the main material, and the modified nitrile rubber is added, so that the dispersibility in the system is good, the low temperature resistance of the polyvinyl chloride resin is improved and the low temperature embrittlement temperature of the polyvinyl chloride resin is reduced in cooperation with the performance of the polyvinyl chloride resin.
Description
Technical Field
The invention belongs to the technical field of high polymer materials, and particularly relates to a novel polyvinyl chloride composite material and a preparation method thereof.
Background
In recent years, with the continuous development of society, sealing materials and flexible pipes for wires, cables, refrigerators, freezers, doors and windows of houses are becoming more popular, and the demand for such sealing materials and flexible pipes is increasing, and the requirements for such sealing materials and flexible pipes are also increasing, in particular, the sealing materials and flexible pipes are flexible, wear-resistant, and low-temperature-resistant.
Polyvinyl chloride is one of general resins, has the characteristics of low price, excellent flame retardant property, excellent insulativity, corrosion resistance, wide raw material sources and the like, is a plastic material with the largest domestic yield and the lowest price at present, can be used for hard products and soft products, and can be used for preparing the sealing materials and the soft pipes.
However, the low temperature resistance of the conventional polyvinyl chloride is poor, the low temperature embrittlement temperature is about-15 ℃, and the sealing material and the soft pipe prepared by using the polyvinyl chloride as a base material are poor in low temperature resistance.
Disclosure of Invention
The invention aims to provide a novel polyvinyl chloride composite material and a preparation method thereof, which are used for solving the following technical problems: the polyvinyl chloride material has poor low temperature resistance and excessively high low temperature embrittlement temperature.
The aim of the invention can be achieved by the following technical scheme:
the novel polyvinyl chloride composite material comprises the following raw materials in parts by weight:
90-100 parts of polyvinyl chloride resin, 8-12 parts of chlorinated polyethylene, 65-70 parts of dioctyl phthalate serving as a plasticizer, 8-12 parts of modified nitrile rubber, 10-20 parts of flame retardant and 1-4 parts of barium zinc heat stabilizer;
the modified nitrile rubber is prepared by the following steps:
adding nitrile rubber into an internal mixer, mixing for 5-10min at 80-85 ℃, heating to 165-170 ℃, adding styrene, mixing for 1-2min, adding methyl phenyl vinyl chlorosilane, mixing for 1-2min, adding initiator dicumyl peroxide, mixing for 5-10min, adding silane coupling agent gamma-aminopropyl triethoxysilane, mixing for 5-10min, and performing surface activation to obtain the modified nitrile rubber. Methyl phenyl vinyl chlorosilane is used as a grafting monomer, styrene is used as a comonomer, dicumyl peroxide is used as an initiator, and nitrile rubber is grafted to obtain modified nitrile rubber; on the one hand, the methyl phenyl vinyl chlorosilane in the modified nitrile rubber plays a role in plasticizing, so that the motion capability of a polyvinyl chloride molecular chain segment at low temperature can be improved, and the introduction of phenyl improves the low temperature resistance of the nitrile rubber; on the other hand, the nitrile rubber particles in the modified nitrile rubber are used as stress concentration points to induce a large amount of silver marks and shear bands, and a large amount of energy is consumed for generating and developing the silver marks and the shear bands, so that the low-temperature impact strength is improved; the surface property of the polyethylene resin is improved by the activation treatment of the coupling agent, so that the polyethylene resin has good compatibility with the polyethylene resin.
As a further scheme of the invention, the mass ratio of the nitrile rubber to the styrene to the methyl phenyl vinyl chlorosilane to the dicumyl peroxide to the silane coupling agent gamma-aminopropyl triethoxysilane is 100:2-20:5-45:0.01-0.1:2-5.
As a further aspect of the invention, the acrylonitrile-butadiene rubber has an acrylonitrile content of 15-24%.
As a further scheme of the invention, the flame retardant is any one of aluminum hydroxide, magnesium hydroxide, antimony oxide, zinc borate and red phosphorus.
As a further scheme of the invention, the preparation method of the novel polyvinyl chloride composite material comprises the following preparation steps:
weighing raw materials according to the weight parts of the formula, adding polyvinyl chloride resin, chlorinated polyethylene and dioctyl phthalate serving as a plasticizer into a high-speed mixer, mixing for 10-15min at 90-100 ℃, heating to 120 ℃, adding modified nitrile rubber, a flame retardant and a barium-zinc heat stabilizer, mixing and pre-plasticizing for 10-30min, conveying to a double-screw extruder for extrusion, mixing and plasticizing, and air-cooling and sieving to obtain the novel polyvinyl chloride composite material.
As a further scheme of the invention, the screw speed of the double screw extruder is 15-50r/s, the temperature of a conveying section of the double screw extruder is 105-115 ℃, the temperature of a melting section is 120-135 ℃, the temperature of a rubber compound section is 120-135 ℃, and the temperature of a homogenizing section is 125-135 ℃.
The invention has the beneficial effects that:
the invention takes methyl phenyl vinyl chlorosilane as a grafting monomer, styrene as a comonomer, dicumyl peroxide as an initiator, and grafts nitrile rubber to obtain modified nitrile rubber; on the one hand, the methyl phenyl vinyl chlorosilane in the modified nitrile rubber plays a role in plasticizing, so that the motion capability of a nitrile rubber molecular chain segment at low temperature can be improved, and the introduction of phenyl improves the low temperature resistance of the nitrile rubber; on the other hand, the nitrile rubber particles in the modified nitrile rubber are used as stress concentration points to induce a large amount of silver marks and shear bands, and a large amount of energy is consumed for generating and developing the silver marks and the shear bands, so that the low-temperature impact strength is improved; the surface property of the polyethylene resin is improved by activating the coupling agent, so that the polyethylene resin has good compatibility with the polyethylene resin;
according to the invention, the polyvinyl chloride resin is adopted as the main material, and the modified nitrile rubber is added, so that the dispersibility in the system is good, the low temperature resistance of the polyvinyl chloride resin is improved and the low temperature embrittlement temperature of the polyvinyl chloride resin is reduced in cooperation with the performance of the polyvinyl chloride resin.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The modified nitrile rubber is prepared by the following steps:
1000g of nitrile rubber (the acrylonitrile content is 15%) is added into an internal mixer to be mixed for 5min at 80 ℃, then the temperature is raised to 165 ℃, 20g of styrene is added to be mixed for 1min, 50g of methyl phenyl vinyl chlorosilane is added to be mixed for 1min, 0.1g of initiator dicumyl peroxide is added to be mixed for 5min, 20g of silane coupling agent gamma-aminopropyl triethoxysilane is added to be mixed for 5min, and surface activation is carried out, thus obtaining the modified nitrile rubber.
Example 2
The modified nitrile rubber is prepared by the following steps:
1000g of nitrile rubber (the acrylonitrile content is 24%) is added into an internal mixer to be mixed for 10min at 85 ℃, the temperature is raised to 170 ℃, 200g of styrene is added to be mixed for 2min, 450g of methyl phenyl vinyl chlorosilane is added to be mixed for 12min, 1g of initiator dicumyl peroxide is added to be mixed for 10min, 50g of silane coupling agent gamma-aminopropyl triethoxysilane is added to be mixed for 10min, and surface activation is carried out, so that the modified nitrile rubber is obtained.
Example 3
The preparation method of the novel polyvinyl chloride composite material comprises the following preparation steps:
weighing raw materials according to the weight portion of a formula, adding 90g of polyvinyl chloride resin, 8g of chlorinated polyethylene and 65g of plasticizer dioctyl phthalate into a high-speed mixer, mixing for 10min at 90 ℃, heating to 120 ℃, adding 8g of modified nitrile rubber prepared in example 1, 10g of flame retardant aluminum hydroxide and 1g of barium zinc heat stabilizer, mixing and pre-plasticizing for 10min, conveying to a double-screw extruder for extrusion, mixing and plasticizing, wherein the screw speed of the double-screw extruder is 15r/s, the conveying section temperature of the double-screw extruder is 105-115 ℃, the melting section temperature is 120-135 ℃, the rubber compound section temperature is 120-135 ℃, and the homogenizing section temperature is 125-135 ℃, and carrying out air cooling sieving to obtain the novel polyvinyl chloride composite material.
Example 4
The preparation method of the novel polyvinyl chloride composite material comprises the following preparation steps:
weighing raw materials according to the weight portion of a formula, adding 100g of polyvinyl chloride resin, 12g of chlorinated polyethylene and 70g of plasticizer dioctyl phthalate into a high-speed mixer, mixing for 15min at 100 ℃, heating to 120 ℃, adding 12g of modified nitrile rubber prepared in example 1, 120g of flame retardant aluminum hydroxide and 4g of barium zinc heat stabilizer, mixing and pre-plasticizing for 30min, conveying to a double-screw extruder for extrusion, mixing and plasticizing, wherein the screw speed of the double-screw extruder is 50r/s, the conveying section temperature of the double-screw extruder is 105-115 ℃, the melting section temperature is 120-135 ℃, the rubber compound section temperature is 120-135 ℃, and the homogenizing section temperature is 125-135 ℃, and carrying out air cooling sieving to obtain the novel polyvinyl chloride composite material.
Comparative example 1
The modified nitrile rubber is prepared by the following steps:
1000g of nitrile rubber (the acrylonitrile content is 25%) is added into an internal mixer to be mixed for 5min at 80 ℃, then the temperature is raised to 165 ℃, 20g of styrene is added to be mixed for 1min, 50g of methyl phenyl vinyl chlorosilane is added to be mixed for 1min, 0.1g of initiator dicumyl peroxide is added to be mixed for 5min, 20g of silane coupling agent gamma-aminopropyl triethoxysilane is added to be mixed for 5min, and surface activation is carried out, thus obtaining the modified nitrile rubber.
In this comparative example, as compared with example 1, only "1000g of nitrile rubber (acrylonitrile content: 15%)" was replaced with "1000g of nitrile rubber (acrylonitrile content: 25%)", and the remaining steps and parameters were the same.
Comparative example 2
The preparation method of the novel polyvinyl chloride composite material comprises the following preparation steps:
weighing raw materials according to the weight portion of the formula, adding 90g of polyvinyl chloride resin, 8g of chlorinated polyethylene and 65g of plasticizer dioctyl phthalate into a high-speed mixer, mixing for 10min at 90 ℃, heating to 120 ℃, adding 8g of nitrile rubber (the acrylonitrile content is 15%), 10g of flame retardant aluminum hydroxide and 1g of barium zinc heat stabilizer, mixing and pre-plasticizing for 10min, conveying to a double-screw extruder for extrusion, mixing and plasticizing, wherein the screw speed of the double-screw extruder is 15r/s, the conveying section temperature of the double-screw extruder is 105-115 ℃, the melting section temperature is 120-135 ℃, the rubber compound section temperature is 120-135 ℃, and the homogenizing section temperature is 125-135 ℃, and carrying out air cooling sieving to obtain the novel polyvinyl chloride composite material.
In this comparative example, as compared with example 3, only "8g of the modified nitrile rubber produced in example 1" was replaced with "8g of nitrile rubber (acrylonitrile content: 15%)", and the remaining steps were the same.
Comparative example 3
The preparation method of the novel polyvinyl chloride composite material comprises the following preparation steps:
weighing raw materials according to the weight portion of a formula, adding 90g of polyvinyl chloride resin, 8g of chlorinated polyethylene and 65g of plasticizer dioctyl phthalate into a high-speed mixer, mixing for 10min at 90 ℃, heating to 120 ℃, adding 8g of modified nitrile rubber prepared in comparative example 1, 10g of flame retardant aluminum hydroxide and 1g of barium zinc heat stabilizer, mixing and pre-plasticizing for 10min, conveying to a double-screw extruder for extrusion, mixing and plasticizing, wherein the screw speed of the double-screw extruder is 15r/s, the conveying section temperature of the double-screw extruder is 105-115 ℃, the melting section temperature is 120-135 ℃, the rubber compound section temperature is 120-135 ℃, and the homogenizing section temperature is 125-135 ℃, and carrying out air cooling sieving to obtain the novel polyvinyl chloride composite material.
In this comparative example, as compared with example 3, only "8g of the modified nitrile rubber produced in example 1" was replaced with "8g of the modified nitrile rubber produced in comparative example 1", and the remaining steps and parameters were the same.
The following performance tests were performed on a novel polyvinyl chloride composite material prepared in examples 3 to 4 and comparative examples 2 to 3:
low temperature embrittlement temperature test: according to GB5470-2008 (determination of embrittlement temperature by Plastic impact method), B-type sample is adopted for embrittlement temperature test; the test results are shown in table 1:
TABLE 1
| Project | Example 3 | Example 4 | Comparative example 2 | Comparative example 3 |
| Low temperature embrittlement temperature/°c | －70 | －67 | －35 | －18 |
As can be seen from Table 1, the novel polyvinyl chloride composite material prepared in examples 3 to 4 of the present invention has a lower low-temperature embrittlement temperature and a higher low-temperature impact resistance than the novel polyvinyl chloride composite material prepared in comparative examples 2 to 3.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The novel polyvinyl chloride composite material is characterized by comprising the following raw materials in parts by weight:
90-100 parts of polyvinyl chloride resin, 8-12 parts of chlorinated polyethylene, 65-70 parts of dioctyl phthalate, 8-12 parts of modified nitrile rubber, 10-20 parts of flame retardant and 1-4 parts of barium-zinc heat stabilizer;
the modified nitrile rubber is prepared by the following steps:
adding nitrile rubber into an internal mixer, mixing for 5-10min at 80-85 ℃, heating to 165-170 ℃, adding styrene, mixing for 1-2min, adding methyl phenyl vinyl chlorosilane, mixing for 1-2min, adding dicumyl peroxide, mixing for 5-10min, and adding gamma-aminopropyl triethoxysilane, mixing for 5-10min to obtain the modified nitrile rubber.
2. The polyvinyl chloride novel composite material according to claim 1, wherein the mass ratio of the nitrile rubber to the styrene to the methyl phenyl vinyl chlorosilane to the dicumyl peroxide to the gamma-aminopropyl triethoxysilane is 100:2-20:5-45:0.01-0.1:2-5.
3. The polyvinyl chloride novel composite material according to claim 1, wherein the acrylonitrile-butadiene rubber has an acrylonitrile content of 15-24%.
4. The novel polyvinyl chloride composite material according to claim 1, wherein the flame retardant is any one of aluminum hydroxide, magnesium hydroxide, antimony oxide, zinc borate and red phosphorus.
5. The method for preparing a novel polyvinyl chloride composite material according to any one of claims 1 to 4, comprising the following preparation steps:
weighing raw materials according to the weight parts of the formula, adding polyvinyl chloride resin, chlorinated polyethylene and dioctyl phthalate into a high-speed mixer, mixing for 10-15min at 90-100 ℃, heating to 120 ℃, adding modified nitrile rubber, flame retardant and barium-zinc heat stabilizer, mixing and pre-plasticizing for 10-30min, conveying to a double-screw extruder for extrusion, mixing and plasticizing, and air-cooling and sieving to obtain the novel polyvinyl chloride composite material.
6. The method for preparing the novel polyvinyl chloride composite material according to claim 5, wherein the screw speed of the twin-screw extruder is 15-50r/s, the temperature of a conveying section of the twin-screw extruder is 105-115 ℃, the temperature of a melting section of the twin-screw extruder is 120-135 ℃, the temperature of a rubber compound section of the twin-screw extruder is 120-135 ℃, and the temperature of a homogenizing section of the twin-screw extruder is 125-135 ℃.
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