CN113429696A - High-strength modified MPVC (multi-layer polyvinyl chloride) pipe and preparation method thereof - Google Patents
High-strength modified MPVC (multi-layer polyvinyl chloride) pipe and preparation method thereof Download PDFInfo
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- 239000004800 polyvinyl chloride Substances 0.000 title claims abstract description 55
- 229920000915 polyvinyl chloride Polymers 0.000 title claims abstract description 55
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical class [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 62
- 238000003756 stirring Methods 0.000 claims abstract description 39
- 239000007788 liquid Substances 0.000 claims abstract description 27
- -1 polyethylene Polymers 0.000 claims abstract description 22
- 239000002245 particle Substances 0.000 claims abstract description 21
- 239000004698 Polyethylene Substances 0.000 claims abstract description 17
- 229920000573 polyethylene Polymers 0.000 claims abstract description 17
- 239000003381 stabilizer Substances 0.000 claims abstract description 16
- 239000002270 dispersing agent Substances 0.000 claims abstract description 15
- HRWYHCYGVIJOEC-UHFFFAOYSA-N 2-(octoxymethyl)oxirane Chemical compound CCCCCCCCOCC1CO1 HRWYHCYGVIJOEC-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000004417 polycarbonate Substances 0.000 claims abstract description 13
- 229920000515 polycarbonate Polymers 0.000 claims abstract description 13
- 239000011347 resin Substances 0.000 claims abstract description 12
- 229920005989 resin Polymers 0.000 claims abstract description 12
- 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
- 239000004014 plasticizer Substances 0.000 claims abstract description 10
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 229910001220 stainless steel Inorganic materials 0.000 claims description 25
- 239000010935 stainless steel Substances 0.000 claims description 25
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 18
- 239000007789 gas Substances 0.000 claims description 15
- 239000007787 solid Substances 0.000 claims description 15
- 229910021389 graphene Inorganic materials 0.000 claims description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- QNVRIHYSUZMSGM-UHFFFAOYSA-N hexan-2-ol Chemical class CCCCC(C)O QNVRIHYSUZMSGM-UHFFFAOYSA-N 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 8
- 238000005336 cracking Methods 0.000 claims description 7
- 230000010355 oscillation Effects 0.000 claims description 7
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 claims description 6
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 6
- 239000004327 boric acid Substances 0.000 claims description 6
- FZHAPNGMFPVSLP-UHFFFAOYSA-N silanamine Chemical compound [SiH3]N FZHAPNGMFPVSLP-UHFFFAOYSA-N 0.000 claims description 6
- BSWXAWQTMPECAK-UHFFFAOYSA-N 6,6-diethyloctyl dihydrogen phosphate Chemical class CCC(CC)(CC)CCCCCOP(O)(O)=O BSWXAWQTMPECAK-UHFFFAOYSA-N 0.000 claims description 5
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 claims description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 5
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical class [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 5
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical group CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 239000004209 oxidized polyethylene wax Substances 0.000 claims description 5
- 235000013873 oxidized polyethylene wax Nutrition 0.000 claims description 5
- 238000005086 pumping Methods 0.000 claims description 5
- 230000005855 radiation Effects 0.000 claims description 5
- 150000003839 salts Chemical class 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- DDJSWKLBKSLAAZ-UHFFFAOYSA-N cyclotetrasiloxane Chemical compound O1[SiH2]O[SiH2]O[SiH2]O[SiH2]1 DDJSWKLBKSLAAZ-UHFFFAOYSA-N 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000001913 cellulose Chemical class 0.000 claims description 2
- 229920002678 cellulose Chemical class 0.000 claims description 2
- 229920002401 polyacrylamide Polymers 0.000 claims description 2
- 238000001816 cooling Methods 0.000 abstract description 4
- 238000007493 shaping process Methods 0.000 abstract description 3
- 239000002861 polymer material Substances 0.000 abstract description 2
- 238000001125 extrusion Methods 0.000 abstract 1
- 230000035939 shock Effects 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 7
- 229920001577 copolymer Polymers 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 239000012790 adhesive layer Substances 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 229920000858 Cyclodextrin Polymers 0.000 description 1
- 239000001116 FEMA 4028 Substances 0.000 description 1
- 229910009821 Ti3GeC2 Inorganic materials 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- WHGYBXFWUBPSRW-FOUAGVGXSA-N beta-cyclodextrin Chemical compound OC[C@H]([C@H]([C@@H]([C@H]1O)O)O[C@H]2O[C@@H]([C@@H](O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O3)[C@H](O)[C@H]2O)CO)O[C@@H]1O[C@H]1[C@H](O)[C@@H](O)[C@@H]3O[C@@H]1CO WHGYBXFWUBPSRW-FOUAGVGXSA-N 0.000 description 1
- 235000011175 beta-cyclodextrine Nutrition 0.000 description 1
- 229960004853 betadex Drugs 0.000 description 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000033444 hydroxylation Effects 0.000 description 1
- 238000005805 hydroxylation reaction Methods 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000001681 protective effect Effects 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
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
Abstract
The invention relates to the technical field of high polymer materials, and discloses a high-strength modified MPVC pipe and a preparation method thereof, wherein the raw materials comprise 80-100 parts of polyvinyl chloride, 3-5 parts of polyethylene, 0.3-0.5 part of modified graphene, 2-4 parts of polycarbonate, 1-2 parts of a dispersant, 1-2 parts of a stabilizer, 3-5 parts of MBS resin, 1-2 parts of a lubricant, 3-5 parts of a plasticizer, 0.5-0.7 part of an antioxidant and 0.1-0.3 part of octyl glycidyl ether, and during preparation, the polyvinyl chloride particles, the polyethylene particles, the dispersant, the octyl glycidyl ether and a molecular softener are stirred, mixed and melted, then the modified graphene is added, and then the mixture is stirred to obtain a molten solution; adding polycarbonate, a stabilizer, MBS resin, a lubricant, an antioxidant and a plasticizer, and stirring to obtain a mixed molten liquid; and transferring the mixed molten liquid into a double-screw extruder for extrusion molding, shaping and cooling to obtain the MPVC pipe. The invention still keeps the shock resistance of the MPVC pipe at low temperature and meets the use requirement of the MPVC pipe in low-temperature environment.
Description
Technical Field
The invention relates to the technical field of high polymer materials, in particular to a high-strength modified MPVC (multi-channel polyvinyl chloride) pipe and a preparation method thereof.
Background
The cable guide pipe is a commonly used protective pipe in cable laying in various places in recent years, and plastic pipes such as MPP, PVC and the like are frequently adopted, but the current plastic pipes have poor strength, cannot bear heavy pressure, are flammable and fragile, are not heat-resistant, are not anti-aging and have short service life. If a lot of materials for reinforcing the strength are put into the pipe processing process, the production cost is increased to a large extent.
The patent with the publication number of CN109210283B discloses a high-strength PVC pipe, which is sequentially provided with a polyvinyl chloride layer, a first adhesive layer, a reinforcing layer, a second adhesive layer, a polyvinyl chloride layer and an anticorrosive layer from inside to outside; the polyvinyl chloride layer mainly comprises the following materials in parts by weight: 100 parts by weight of polyvinyl chloride; 10-12 parts by weight of polycarbonate; 5-8 parts of acetylene-propylene copolymer; 2-4 parts of a stabilizer; 8-12 parts by weight of a filler; 1-3 parts of beta-cyclodextrin, and the filler comprises 70-80 wt% of Ti3GeC2And 20 to 30 wt% of aluminum nitride. According to the technical scheme, the formula of the polyvinyl chloride layer of the high-strength PVC pipe is optimized, so that the impact resistance and the frost cracking resistance of the high-strength PVC pipe are improved.
According to the scheme, the impact resistance of the PVC pipe is improved by adding the acetylene-propylene copolymer, so that the strength is improved, but the stability of the acetylene-propylene copolymer is poor, the impact strength of the PVC pipe after the acetylene-propylene copolymer is added can be really improved at normal temperature, but if the PVC pipe is used in northern areas, the temperature of northern hemispheres is lowered to minus dozens of degrees in winter, and the PVC pipe is easy to become brittle at such low temperature, so that the impact strength of the PVC pipe is reduced, and therefore, the pipe of the scheme cannot meet the strength requirement under the low-temperature condition.
Disclosure of Invention
In view of the above, the present invention aims to provide a high strength modified MPVC pipe and a preparation method thereof, which can maintain the impact resistance of the MPVC pipe at a low temperature and meet the use requirements of the MPVC pipe in a low temperature environment.
The invention solves the technical problems by the following technical means:
a high-strength modified MPVC pipe comprises the following raw materials in parts by weight: 80-100 parts of polyvinyl chloride, 3-5 parts of polyethylene, 0.3-0.5 part of modified graphene, 2-4 parts of polycarbonate, 1-2 parts of dispersant, 1-2 parts of stabilizer, 3-5 parts of MBS resin, 1-2 parts of lubricant, 3-5 parts of plasticizer, 0.5-0.7 part of antioxidant and 0.1-0.3 part of octyl glycidyl ether.
Further, the high-strength modified MPVC pipe comprises the following raw materials in parts by weight: 90 parts of polyvinyl chloride, 4 parts of polyethylene, 0.4 part of modified graphene, 3 parts of polycarbonate, 1.5 parts of dispersant, 1.5 parts of stabilizer, 4 parts of MBS resin, 1.5 parts of lubricant, 4 parts of plasticizer, 0.6 part of antioxidant and 0.2 part of octyl glycidyl ether.
Further, the raw material of the high-strength modified MPVC pipe also comprises 0.2 part of molecular softener, wherein the molecular softener is polymethyl cyclotetrasiloxane, and the molecular weight of the polymethyl cyclotetrasiloxane is 10000-20000. When the molecular softener is used for processing the MPVC pipe, molecules of macromolecules such as polyvinyl chloride and the like can be stretched, so that the polyvinyl chloride molecules can be inserted into a C-C net structure in the modified graphene, the attraction of the polyvinyl chloride molecules is enhanced, and the strength of the MPVC pipe under the low-temperature condition is increased.
Further, the stabilizer is a lead salt stabilizer, the lubricant is oxidized polyethylene wax, the plasticizer is dioctyl phthalate, and the antioxidant is phosphite triester.
Further, the dispersant is at least one of triethyl hexyl phosphoric acid, sodium dodecyl sulfate, methyl amyl alcohol, cellulose derivatives and polyacrylamide.
The invention also discloses a preparation method of the high-strength modified MPVC pipe, which comprises the following steps:
a1, stirring and mixing polyvinyl chloride particles, polyethylene particles, a dispersing agent, octyl glycidyl ether and a molecular softener, melting at the temperature of 110-130 ℃, stirring for 1-2h, adding modified graphene, and stirring for 5-7h to obtain a molten liquid;
a2, adding polycarbonate, a stabilizer, MBS resin, a lubricant and an antioxidant into the molten liquid obtained in the step A1, continuously stirring for 1-2h, adding a plasticizer, and stirring for 10-20min to obtain mixed molten liquid;
a3, transferring the mixed molten liquid obtained in the step A2 into a double-screw extruder, setting the temperature of a main machine at 160-.
In the invention, the polyvinyl chloride has the advantages of flame retardance and high mechanical strength, and the polyvinyl chloride has poor thermal stability and light resistance; the heat resistance, the impact resistance and the oxidation resistance are improved by adding polycarbonate; the MBS resin has good impact resistance, cold resistance and processing fluidity. The modified graphene in the invention is of a C-C connected reticular structure, polyvinyl chloride particles and polyethylene particles are continuously stirred with the modified graphene in a molten state, octyl glycidyl ether can reduce the viscosity of the whole molten liquid, a dispersing agent is used for dispersing, a molecular softener can straighten and smooth molecular chains of polyethylene and polyvinyl chloride during stirring, then the molecular chains of polyethylene and polyvinyl chloride are partially inserted into the C-C connected reticular structure of the modified graphene during stirring, so that a plurality of polyvinyl chloride molecular chains are wound by the C-C reticular structure of the modified graphene, the molecular chains of polyvinyl chloride are partially entangled, the attraction force among all molecules of polyvinyl chloride is increased, the structure of the graphene is stable, and the C-C bond structure of the graphene is basically not influenced by the environment such as temperature and the like, the polyvinyl chloride pipe can be intertwined with molecules of polyvinyl chloride, so that the strength and the impact resistance of the MPVC pipe are ensured, and the use requirement of the MPVC pipe in a low-temperature environment is met.
Further, in the step a1, after the modified graphene is added, in the stirring process, intermittent ultrasonic oscillation is applied to the molten liquid, the frequency of the ultrasonic is 30000-40000Hz, and after the intermittent frequency is 1min of oscillation, oscillation is stopped for 1min and then is performed until the stirring is completed. Intermittent oscillation can increase the number of the polyvinyl chloride molecular chains penetrating into the C-C network structure, so that more polyvinyl chloride molecular chains are intertwined with each other.
Further, the preparation method of the modified graphene comprises the following steps:
b1, adding 20 parts of 1000-mesh flaky graphite powder with the particle size of 800-inch into 15-20 parts of aminosilane and 15-20 parts of boric acid solution with the mass concentration of 0.8-1.5mol/L according to parts by mass, ultrasonically dispersing for 5-10min, placing the mixture in a stainless steel high-pressure bottle, sealing, slowly pumping away air in the stainless steel high-pressure bottle, filling liquid nitrogen into the stainless steel high-pressure bottle, shaking up, and standing for 10-15 h;
b2, connecting the stainless steel high-pressure bottle with solid gas preparation equipment to prepare solid gas;
b3, sequentially placing the prepared solid gas in ultraviolet cleaning machines with 185nm and 254nm wave bands for ultraviolet high-energy radiation, and micro-cracking to strip out the primary modified graphene;
b5, adding the prepared graphene into absolute ethyl alcohol, and dispersing for 10-20min by using ultrasonic;
and B6, adding 10-20 parts of gamma-aminopropyltriethoxysilane and 15-20 parts of acetic acid by mass, heating to 60-70 ℃, and then reacting for 12-18h under ultrasonic stirring to obtain the modified graphene.
The scaly graphite powder is put into aminosilane and boric acid solution, and then micro-cracking is generated to strip out the primary modified graphene which is subjected to carbonyl and carbon hydroxylation; in the reaction of the gamma-aminopropyltriethoxysilane and acetic acid, the preliminarily modified graphene can enhance the covalent bond between C and C in the graphene, so that the entanglement stability between polyvinyl chloride molecular chains is further increased.
Furthermore, the vacuum degree in the stainless steel high-pressure bottle is-0.05-0.08 Mpa.
The invention has the beneficial effects that:
the modified graphene in the invention is of a C-C connected reticular structure, polyvinyl chloride particles and polyethylene particles are continuously stirred with the modified graphene in a molten state, octyl glycidyl ether can reduce the viscosity of the whole molten liquid, a dispersing agent is used for dispersing, a molecular softener can straighten and smooth molecular chains of polyethylene and polyvinyl chloride during stirring, then the molecular chains of polyethylene and polyvinyl chloride are partially inserted into the C-C connected reticular structure of the modified graphene during stirring, so that a plurality of polyvinyl chloride molecular chains are wound by the C-C reticular structure of the modified graphene, the molecular chains of polyvinyl chloride are partially entangled, the attraction force among all molecules of polyvinyl chloride is increased, the structure of the graphene is stable, and the C-C bond structure of the graphene is basically not influenced by the environment such as temperature and the like, the polyvinyl chloride pipe can be intertwined with molecules of polyvinyl chloride, so that the strength and the impact resistance of the MPVC pipe are ensured, and the use requirement of the MPVC pipe in a low-temperature environment is met.
Detailed Description
The present invention will be described in detail with reference to examples below:
examples 1,
The preparation of the modified graphene of this example includes the following steps:
b1, taking 20kg of scaly graphite powder with the particle size of 800 meshes, adding the scaly graphite powder into 15kg of aminosilane and 15kg of boric acid solution with the mass concentration of 0.8mol/L, ultrasonically dispersing for 5min, placing the mixture into a stainless steel high-pressure bottle, sealing, slowly pumping air in the stainless steel high-pressure bottle to ensure that the vacuum degree in the stainless steel high-pressure bottle is-0.05 Mpa, then filling liquid nitrogen into the stainless steel high-pressure bottle, shaking uniformly, and standing for 10 h;
b2, connecting the stainless steel high-pressure bottle with solid gas preparation equipment to prepare solid gas;
b3, sequentially placing the prepared solid gas in ultraviolet cleaning machines with 185nm and 254nm wave bands for ultraviolet high-energy radiation, and micro-cracking to strip out the primary modified graphene;
b5, adding the prepared graphene into absolute ethyl alcohol, and dispersing for 10min by using ultrasonic;
and B6, adding 10kg of gamma-aminopropyltriethoxysilane and 15kg of acetic acid, heating to 60 ℃, and then reacting for 12 hours under ultrasonic stirring to obtain the modified graphene.
Examples 2,
B1, taking 20kg of scaly graphite powder with the particle size of 900 meshes, adding the scaly graphite powder into 17.5kg of aminosilane and 17.5kg of boric acid solution with the mass concentration of 1.2mol/L, ultrasonically dispersing for 7min, placing the mixture into a stainless steel high-pressure bottle, sealing, slowly pumping air in the stainless steel high-pressure bottle to ensure that the vacuum degree in the stainless steel high-pressure bottle is 0.02Mpa, then filling liquid nitrogen into the stainless steel high-pressure bottle, shaking uniformly, and standing for 13 h;
b2, connecting the stainless steel high-pressure bottle with solid gas preparation equipment to prepare solid gas;
b3, sequentially placing the prepared solid gas in ultraviolet cleaning machines with 185nm and 254nm wave bands for ultraviolet high-energy radiation, and micro-cracking to strip out the primary modified graphene;
b5, adding the prepared graphene into absolute ethyl alcohol, and dispersing for 15min by using ultrasonic;
and B6, adding 15kg of gamma-aminopropyltriethoxysilane and 17.5kg of acetic acid, heating to 65 ℃, and then reacting for 15 hours under ultrasonic stirring to obtain the modified graphene.
Examples 3,
B1, taking 20kg of scaly graphite powder with the particle size of 1000 meshes, adding the scaly graphite powder into 20kg of aminosilane and 20kg of boric acid solution with the mass concentration of 1.5mol/L, ultrasonically dispersing for 10min, placing the mixture into a stainless steel high-pressure bottle, sealing, slowly pumping air out of the stainless steel high-pressure bottle to enable the vacuum degree in the stainless steel high-pressure bottle to be 0.08MPa, filling liquid nitrogen into the stainless steel high-pressure bottle, shaking uniformly, and standing for 15 h;
b2, connecting the stainless steel high-pressure bottle with solid gas preparation equipment to prepare solid gas;
b3, sequentially placing the prepared solid gas in ultraviolet cleaning machines with 185nm and 254nm wave bands for ultraviolet high-energy radiation, and micro-cracking to strip out the primary modified graphene;
b5, adding the prepared graphene into absolute ethyl alcohol, and dispersing for 20min by using ultrasonic;
and B6, adding 20kg of gamma-aminopropyltriethoxysilane and 20kg of acetic acid, heating to 70 ℃, and then reacting for 18 hours under ultrasonic stirring to obtain the modified graphene.
Examples 4,
The preparation method of the high-strength modified MPVC pipe comprises the following steps:
a1, mixing 80kg of polyvinyl chloride particles, 3kg of polyethylene particles, 1kg of dispersant consisting of triethylhexyl phosphoric acid, sodium dodecyl sulfate and methyl amyl alcohol, 0.1kg of octyl glycidyl ether and 0.2kg of polymethylcyclotetrasiloxane, wherein the molecular weight of the polymethylcyclotetrasiloxane is about 10000, stirring and mixing, melting at the temperature of 110 ℃, stirring for 1h, adding 0.3kg of the modified graphene prepared in the example 2, and stirring for 5h to obtain molten liquid;
a2, adding 2kg of polycarbonate, 1kg of lead salt stabilizer, 3kg of MBS resin, 1kg of oxidized polyethylene wax and 0.5kg of phosphite triester into the melt obtained in the step A1, continuing stirring for 1h, adding 3kg of dioctyl phthalate, and stirring for 10min to obtain a mixed melt;
and A3, transferring the mixed molten liquid obtained in the step A2 into a double-screw extruder, setting the temperature of a main machine at 150 ℃, the temperature of a die at 160 ℃, the temperature of a machine head at 180 ℃, extruding, molding, shaping and cooling to obtain the MPVC pipe.
Examples 5,
The preparation method of the high-strength modified MPVC pipe comprises the following steps:
a1, mixing 90kg of polyvinyl chloride particles, 4kg of polyethylene particles, 1.5kg of dispersant consisting of triethylhexyl phosphoric acid, sodium dodecyl sulfate and methyl amyl alcohol, 0.2kg of octyl glycidyl ether and 0.2kg of polymethylcyclotetrasiloxane, wherein the molecular weight of the polymethylcyclotetrasiloxane is about 15000, stirring and mixing, melting at the temperature of 120 ℃, stirring for 1.5 hours, then adding 0.4kg of the modified graphene prepared in the example 2, and then stirring for 6 hours to obtain molten liquid;
a2, adding 3kg of polycarbonate, 1.5kg of lead salt stabilizer, 4kg of MBS resin, 1.5kg of oxidized polyethylene wax and 0.6kg of phosphite triester into the molten liquid obtained in the step A1, continuously stirring for 1-2h, adding 4kg of dioctyl phthalate, and stirring for 15min to obtain mixed molten liquid;
and A3, transferring the mixed molten liquid obtained in the step A2 into a double-screw extruder, setting the temperature of a main machine to be 155 ℃, the temperature of a die to be 170 ℃ and the temperature of a machine head to be 185 ℃, extruding, molding, shaping and cooling to obtain the MPVC pipe.
Examples 6,
The preparation method of the high-strength modified MPVC pipe comprises the following steps:
a1, mixing 100kg of polyvinyl chloride particles, 5kg of polyethylene particles, 2kg of dispersant consisting of triethylhexyl phosphoric acid, sodium dodecyl sulfate and methyl amyl alcohol, 0.3kg of octyl glycidyl ether and 0.2kg of polymethylcyclotetrasiloxane, wherein the molecular weight of the polymethylcyclotetrasiloxane is about 20000, stirring and mixing, melting at the temperature of 130 ℃, stirring for 2 hours, adding 0.5kg of the modified graphene prepared in example 2, and stirring for 7 hours to obtain molten liquid;
a2, adding 4kg of polycarbonate, 2kg of lead salt stabilizer, 5kg of MBS resin, 2kg of oxidized polyethylene wax and 0.7kg of phosphite triester into the melt obtained in the step A1, continuing stirring for 2 hours, adding 5kg of dioctyl phthalate, and stirring for 20min to obtain a mixed melt;
and A3, transferring the mixed molten liquid obtained in the step A2 into a double-screw extruder, setting the temperature of a main machine at 160 ℃, the temperature of a die at 180 ℃, the temperature of a machine head at 190 ℃, extruding, molding, and cooling to obtain the MPVC pipe.
Example 7,
Example 7 is compared with example 5, and the only difference is that the graphene used in example 7 is currently the conventional graphene on the market.
Examples 4-7 and commercial PVC pipe were tested for impact strength and toughness according to national standards GB/T1843-1996, GB/T6112-1985, GB/T3139-2005 and GB20286-2006, respectively, with the results shown in the following table:
from the results in the table above, it can be seen that:
as can be seen from the comparison between examples 4 to 6 and the comparative example, after the modified graphene prepared in the present application is added, the C — C bond structure of the modified graphene is not substantially affected by the environments such as temperature, and molecules of polyvinyl chloride can still be entangled, so that the strength and impact resistance of the MPVC pipe are ensured, and the use requirement of the MPVC pipe in a low temperature environment is met.
From a comparison of examples 4 to 6, it can be seen that the impact resistance and flexural modulus properties of the MPVC pipe prepared using the material formulation and preparation method of example 5 are better.
From the comparison between the embodiment 5 and the embodiment 7, it can be seen that the modified graphene prepared by the method can further increase the strength of a C-C bond structure and can further entangle molecules of polyvinyl chloride, so that the strength and the impact resistance of the MPVC pipe are ensured, and the use requirement of the MPVC pipe in a low-temperature environment is met.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims. The techniques, shapes, and configurations not described in detail in the present invention are all known techniques.
Claims (9)
1. A high strength modified MPVC pipe which is characterized in that: the material comprises the following raw materials in parts by weight: 80-100 parts of polyvinyl chloride, 3-5 parts of polyethylene, 0.3-0.5 part of modified graphene, 2-4 parts of polycarbonate, 1-2 parts of dispersant, 1-2 parts of stabilizer, 3-5 parts of MBS resin, 1-2 parts of lubricant, 3-5 parts of plasticizer, 0.5-0.7 part of antioxidant and 0.1-0.3 part of octyl glycidyl ether.
2. The high strength modified MPVC pipe of claim 1, wherein: the high-strength modified MPVC pipe comprises the following raw materials in parts by weight: 90 parts of polyvinyl chloride, 4 parts of polyethylene, 0.4 part of modified graphene, 3 parts of polycarbonate, 1.5 parts of dispersant, 1.5 parts of stabilizer, 4 parts of MBS resin, 1.5 parts of lubricant, 4 parts of plasticizer, 0.6 part of antioxidant and 0.2 part of octyl glycidyl ether.
3. The high strength modified MPVC pipe of claim 2, wherein: the raw material of the high-strength modified MPVC pipe also comprises 0.2 part of molecular softener, wherein the molecular softener is polymethyl cyclotetrasiloxane, and the molecular weight of the polymethyl cyclotetrasiloxane is 10000-2000.
4. A high strength modified MPVC pipe according to claim 3, wherein: the stabilizer is a lead salt stabilizer, the lubricant is oxidized polyethylene wax, the plasticizer is dioctyl phthalate, and the antioxidant is phosphite triester.
5. The high strength modified MPVC pipe of claim 4, wherein: the dispersing agent is at least one of triethyl hexyl phosphoric acid, sodium dodecyl sulfate, methyl amyl alcohol, cellulose derivatives and polyacrylamide.
6. A preparation method of a high-strength modified MPVC pipe is characterized by comprising the following steps: the method comprises the following steps:
a1, stirring and mixing polyvinyl chloride particles, polyethylene particles, a dispersing agent, octyl glycidyl ether and a molecular softener, melting at the temperature of 110-130 ℃, stirring for 1-2h, adding modified graphene, and stirring for 5-7h to obtain a molten liquid;
a2, adding polycarbonate, a stabilizer, MBS resin, a lubricant and an antioxidant into the molten liquid obtained in the step A1, continuously stirring for 1-2h, adding a plasticizer, and stirring for 10-20min to obtain mixed molten liquid;
a3, transferring the mixed molten liquid obtained in the step A2 into a double-screw extruder, setting the temperature of a main machine at 160-.
7. The method for preparing a high-strength modified MPVC pipe as claimed in claim 6, wherein: in the step A1, after the modified graphene is added, intermittent ultrasonic oscillation is applied to the molten liquid in the stirring process, the frequency of the ultrasonic wave is 30000-40000Hz, and after the intermittent frequency is 1min of oscillation, oscillation is stopped for 1min and then is performed until the stirring is finished.
8. The method for preparing a high-strength modified MPVC pipe as claimed in claim 7, wherein: the preparation method of the modified graphene comprises the following steps:
b1, adding 20 parts of 1000-mesh flaky graphite powder with the particle size of 800-inch into 15-20 parts of aminosilane and 15-20 parts of boric acid solution with the mass concentration of 0.8-1.5mol/L according to parts by mass, ultrasonically dispersing for 5-10min, placing the mixture in a stainless steel high-pressure bottle, sealing, slowly pumping away air in the stainless steel high-pressure bottle, filling liquid nitrogen into the stainless steel high-pressure bottle, shaking up, and standing for 10-15 h;
b2, connecting the stainless steel high-pressure bottle with solid gas preparation equipment to prepare solid gas;
b3, sequentially placing the prepared solid gas in ultraviolet cleaning machines with 185nm and 254nm wave bands for ultraviolet high-energy radiation, and micro-cracking to strip out the primary modified graphene;
b5, adding the prepared graphene into absolute ethyl alcohol, and dispersing for 10-20min by using ultrasonic;
and B6, adding 10-20 parts of gamma-aminopropyltriethoxysilane and 15-20 parts of acetic acid by mass, heating to 60-70 ℃, and then reacting for 12-18h under ultrasonic stirring to obtain the modified graphene.
9. The method for preparing a high-strength modified MPVC pipe as claimed in claim 8, wherein: the vacuum degree in the stainless steel high-pressure bottle is-0.05-0.08 Mpa.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110746796A (en) * | 2019-11-11 | 2020-02-04 | 长沙天源羲王材料科技有限公司 | Modified graphene and preparation method of slurry containing modified graphene |
| CN111440392A (en) * | 2020-04-10 | 2020-07-24 | 杭州联通管业有限公司 | Anti-tensile PVC communication pipe and preparation method thereof |
| CN111647240A (en) * | 2020-06-10 | 2020-09-11 | 杭州联通管业有限公司 | Impact-resistant toughened MPVC (multi-phase polyvinyl chloride) power tube and preparation method thereof |
-
2021
- 2021-05-26 CN CN202110580740.7A patent/CN113429696A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110746796A (en) * | 2019-11-11 | 2020-02-04 | 长沙天源羲王材料科技有限公司 | Modified graphene and preparation method of slurry containing modified graphene |
| CN111440392A (en) * | 2020-04-10 | 2020-07-24 | 杭州联通管业有限公司 | Anti-tensile PVC communication pipe and preparation method thereof |
| CN111647240A (en) * | 2020-06-10 | 2020-09-11 | 杭州联通管业有限公司 | Impact-resistant toughened MPVC (multi-phase polyvinyl chloride) power tube and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 谭寿再主编: "《塑料测试技术》", 31 August 2013, 北京：中国轻工业出版社 * |
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