CN116731446A - Super-strong compression-resistant HPVC pipe and preparation method thereof - Google Patents
Super-strong compression-resistant HPVC pipe and preparation method thereof Download PDFInfo
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- CN116731446A CN116731446A CN202310709991.XA CN202310709991A CN116731446A CN 116731446 A CN116731446 A CN 116731446A CN 202310709991 A CN202310709991 A CN 202310709991A CN 116731446 A CN116731446 A CN 116731446A
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- 238000002360 preparation method Methods 0.000 title abstract description 27
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- 239000004800 polyvinyl chloride Substances 0.000 claims abstract description 52
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- 239000000945 filler Substances 0.000 claims abstract description 33
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- 238000012545 processing Methods 0.000 claims abstract description 15
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- 239000012760 heat stabilizer Substances 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims description 46
- 229920002748 Basalt fiber Polymers 0.000 claims description 42
- 239000004709 Chlorinated polyethylene Substances 0.000 claims description 38
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 38
- 239000006229 carbon black Substances 0.000 claims description 33
- 239000004801 Chlorinated PVC Substances 0.000 claims description 31
- 229920000457 chlorinated polyvinyl chloride Polymers 0.000 claims description 31
- VBICKXHEKHSIBG-UHFFFAOYSA-N 1-monostearoylglycerol Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(O)CO VBICKXHEKHSIBG-UHFFFAOYSA-N 0.000 claims description 28
- 238000002156 mixing Methods 0.000 claims description 23
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 13
- WWNGFHNQODFIEX-UHFFFAOYSA-N buta-1,3-diene;methyl 2-methylprop-2-enoate;styrene Chemical compound C=CC=C.COC(=O)C(C)=C.C=CC1=CC=CC=C1 WWNGFHNQODFIEX-UHFFFAOYSA-N 0.000 claims description 12
- 229920000578 graft copolymer Polymers 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 12
- 239000001788 mono and diglycerides of fatty acids Substances 0.000 claims description 12
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- IHBCFWWEZXPPLG-UHFFFAOYSA-N [Ca].[Zn] Chemical compound [Ca].[Zn] IHBCFWWEZXPPLG-UHFFFAOYSA-N 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 11
- 229920001577 copolymer Polymers 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 11
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- 238000005406 washing Methods 0.000 claims description 10
- 239000004609 Impact Modifier Substances 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 6
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 5
- IZHVBANLECCAGF-UHFFFAOYSA-N 2-hydroxy-3-(octadecanoyloxy)propyl octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(O)COC(=O)CCCCCCCCCCCCCCCCC IZHVBANLECCAGF-UHFFFAOYSA-N 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 3
- 229910021485 fumed silica Inorganic materials 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- WZUNUACWCJJERC-UHFFFAOYSA-N 2,2-bis(hydroxymethyl)butyl octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(CC)(CO)CO WZUNUACWCJJERC-UHFFFAOYSA-N 0.000 claims description 2
- 229920009204 Methacrylate-butadiene-styrene Polymers 0.000 claims description 2
- 235000021355 Stearic acid Nutrition 0.000 claims description 2
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 2
- 229940074045 glyceryl distearate Drugs 0.000 claims description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 2
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 2
- 239000004209 oxidized polyethylene wax Substances 0.000 claims description 2
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- SVUQHVRAGMNPLW-UHFFFAOYSA-N glycerol monostearate Natural products CCCCCCCCCCCCCCCCC(=O)OCC(O)CO SVUQHVRAGMNPLW-UHFFFAOYSA-N 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 3
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- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 239000006057 Non-nutritive feed additive Substances 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
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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
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The application relates to the technical field of polyvinyl chloride pipes, in particular to a super-strong compression-resistant HPVC pipe and a preparation method thereof, wherein the super-strong compression-resistant HPVC pipe comprises the following raw materials in parts by weight: 60-90 parts of polyvinyl chloride resin, 10-30 parts of modified resin, 5-12 parts of filler, 1-5 parts of heat stabilizer, 2-3 parts of processing modification auxiliary agent, 1-2 parts of lubricant and 0.5-1 part of impact modification auxiliary agent. The aim is that: the HPVC pipe has excellent compression resistance, can adapt to different environments and increases the application range of the HPVC pipe.
Description
Technical Field
The application relates to the technical field of polyvinyl chloride pipes, in particular to a super-strong compression-resistant HPVC pipe and a preparation method thereof.
Background
PVC has been the most popular plastic in world production and is very widely used. The product has wide application in building materials, industrial products, daily necessities, floor leathers, floor tiles, artificial leathers, pipes, wires and cables, packaging films, bottles, foaming materials, sealing materials, fibers and the like. In terms of pipes, polyvinyl chloride pipes have various excellent properties such as light weight, excellent mechanical strength, chemical resistance, corrosion resistance, chemical resistance, thermal insulation, electrical insulation, etc., and long life and low cost, and thus are widely used in construction engineering, traffic engineering, environmental engineering, energy, hydraulic engineering, etc.
The HPVC pipe is generally used for buried communication optical (electric) cable protection, power cable protection and the like in various building fields such as outdoor bridge plug-in, tunnels, light rails, airports, subways, stadiums, real estate and the like, and can replace plastic-plated or galvanized steel pipes. The prior HPVC solid wall pipe is easy to crack when facing to some outdoor use scenes, such as pavement construction rolling, excavation and the like, and has huge external force, and particularly under the condition of lower temperature, the pipe is easier to crack and even crack under the action of external force, thereby influencing the use.
Disclosure of Invention
Therefore, the application aims to provide a super-strong compression-resistant HPVC pipe and a preparation method thereof, so that the HPVC pipe has excellent compression resistance, can adapt to different environments and enlarge the application range of the HPVC pipe.
The application solves the technical problems by the following technical means:
a super-strong compression-resistant HPVC pipe comprises the following raw materials in parts by weight: 60-90 parts of polyvinyl chloride resin, 10-30 parts of modified resin, 5-12 parts of filler, 1-5 parts of heat stabilizer, 2-3 parts of processing modification auxiliary agent, 1-2 parts of lubricant and 0.5-1 part of impact modification auxiliary agent.
The modified resin and the filler are adopted to modify the polyvinyl chloride, so that the compression resistance of the polyvinyl chloride pipe can be greatly enhanced, the compression resistance of the polyvinyl chloride pipe is further enhanced through the synergistic effect of the impact modification auxiliary agent, and the processing performance of the polyvinyl chloride pipe can be improved through the selection of the processing auxiliary agent, so that the condition of speckles is avoided.
Preferably, the polyvinyl chloride resin has a K value of 60 to 68 and a viscosity number of 60 to 200ml/g.
Further preferably, the polyvinyl chloride resin has a K value of 66 to 68, a polymerization degree of 970 to 1070, and a viscosity number of 80 to 160ml/g.
By adopting the polyvinyl chloride resin with KK value of 66-68 and viscosity number of 80-160ml/g, the resin melt has better fluidity and plasticity under the conditions of better tensile property and impact strength, and is more beneficial to processing.
Preferably, the modified resin is a mixture of chlorinated polyethylene and chlorinated polyvinyl chloride, and the mass ratio of the chlorinated polyethylene to the chlorinated polyvinyl chloride is 1: (0.2-0.5).
The chlorinated polyethylene has excellent weather resistance, ozone resistance, chemical resistance and ageing resistance, and has good oil resistance, flame retardance and coloring performance. The toughness is good (the toughness is still good at the temperature of minus 30 ℃), the PVC plastic has good compatibility with other high polymer materials, and is also an excellent impact modifier for PVC plastics; chlorinated polyvinyl chloride is a product of further chlorination modification of polyvinyl chloride, which not only has the properties of polyvinyl chloride, but also improves the heat resistance and corrosion resistance to acid, alkali, salt, oxidant and the like, as well as the resin solubility and heat distortion temperature.
By adopting the chlorinated polyethylene and the chlorinated polyvinyl chloride as the modified resin, the impact resistance, the low-temperature flexibility and the heat resistance of the polyvinyl chloride can be improved, and the chlorinated polyethylene and the chlorinated polyvinyl chloride can be well compatible with the polyvinyl chloride resin, thereby being beneficial to improving the processing performance.
The mass ratio of the chlorinated polyethylene to the chlorinated polyvinyl chloride is preferably 1:0.4, and the impact resistance of the polyvinyl chloride is facilitated to be highlighted by controlling the mass ratio of the chlorinated polyethylene to the chlorinated polyvinyl chloride.
Preferably, the filler is modified basalt fiber and white carbon black, and the preparation of the filler comprises the following steps:
B1. placing basalt fibers in a dilute acid solution, stirring for 4-8 hours, washing and drying after stirring is completed to obtain pretreated basalt fibers;
B2. carrying out surface modification on the pretreated basalt fiber by adopting low-temperature plasma to obtain modified basalt fiber;
B3. pre-dispersing white carbon black into slurry through water, then placing modified basalt fiber into the slurry, adding a silane coupling agent, stirring for 3-7h, washing and drying to obtain the filler.
The basalt fiber has the excellent performances of high strength, electric insulation, corrosion resistance, good high temperature resistance, oxidation resistance, radiation resistance, heat insulation, sound insulation, high compression strength and shearing strength, suitability for use in various environments and the like, and the surface energy of the basalt fiber is increased by cleaning the surface of the basalt fiber and then performing low-temperature plasma treatment, so that the basalt fiber is beneficial to use of the basalt fiber and other materials.
White carbon black is high-temperature resistant, nonflammable, odorless, has good electrical insulation, can be used as a reinforcing agent, a thickening agent and the like, but has large specific surface area and small particle size, is easy to fly in the use process, is easy to disperse unevenly in resin, and is in a particle shape.
In the scheme, the basalt fiber is preferably basalt short fiber, the monofilament diameter of the basalt short fiber is 10-15um, white carbon black is firstly dispersed to form slurry, and then the slurry is crosslinked with the basalt fiber subjected to surface treatment, so that the use of the white carbon black and the dispersion in resin are facilitated.
Preferably, in the step S2, the conditions of the low-temperature plasma treatment are as follows: and (3) taking air as working gas, and performing low-temperature plasma treatment for 5-10min under the conditions of 50pa of pressure and 150W of discharge power.
Preferably, the white carbon black is one of precipitated silica, fumed silica and ultrafine silica gel.
Further preferably, the white carbon black is preferably fumed silica.
Preferably, in the steps S1 and S3, the drying condition is that the baking is carried out for 2-5 hours at 80-100 ℃.
Preferably, the heat stabilizer is an environment-friendly calcium zinc stabilizer, the processing modification auxiliary agent is methyl methacrylate copolymer, the impact modification auxiliary agent is one of ARC impact modifier, MBS impact modifier, methyl methacrylate-butadiene-styrene graft copolymer, chlorinated polyethylene and ethylene-vinyl acetate copolymer, and the lubricant is one or a combination of several of stearic acid, oxidized polyethylene wax, glyceryl monostearate, glyceryl distearate or pentaerythritol monostearate.
Further preferably, the impact modifier is methyl methacrylate-butadiene-styrene graft copolymer, so that the impact resistance of the polyvinyl chloride pipe can be further improved, and the impact modifier and the processing modifier can cooperate to further improve the processing performance.
Further preferably, the lubricant is preferably a polyethylene wax and glyceryl monostearate, wherein the polyethylene wax is used as the outer lubricant and the glyceryl monostearate is used as the inner lubricant, and the mass ratio of the polyethylene wax to the glyceryl monostearate is 1:1.
The application also discloses a preparation method of the super-strong compression-resistant HPVC pipe, which comprises the following steps:
A1. putting the modified resin into a high-speed mixer, uniformly stirring, adding the filler, and uniformly stirring to obtain a premix;
A2. adding polyvinyl chloride resin into the premix, uniformly stirring, heating to 140-160 ℃, carrying out melt blending, adding a heat stabilizer, a processing modification auxiliary agent, a lubricant and an impact modification auxiliary agent, uniformly mixing, transferring into a screw extruder, extruding, and granulating to obtain a master batch;
A3. adding the master batch into a single screw extruder, extruding, and cooling to obtain the ultra-strong compression-resistant HPVC pipe.
The chlorinated polyethylene, the chlorinated polyvinyl chloride and the modified basalt fiber and the white carbon black are mixed to prepare the premix, so that the chlorinated polyethylene, the white carbon black and the basalt fiber are fully combined, the white carbon black and the basalt fiber form a net-shaped framework and are combined with the chlorinated polyvinyl chloride, the combination property and the impact resistance of the chlorinated polyethylene and the white carbon black are improved, and the influence on the processability is reduced, so that the impact resistance of the polyvinyl chloride pipe can be improved when the premix and the polyvinyl chloride are melt blended.
Preferably, in the step A3, the rotating speed of the single screw extruder is 250-350r/min.
Further preferably, the rotation speed of the single screw extruder is 320r/min.
The application adopting the scheme has the following beneficial effects:
1. the compression resistance and the processing performance of the polyvinyl chloride pipe can be improved by adding the modified resin and the processing aid into the polyvinyl chloride, and the compression resistance of the polyvinyl chloride pipe can be further improved by adding the modified basalt fiber and the white carbon black, and the impact resistance of the polyvinyl chloride pipe at low temperature can be improved, so that the application range of the polyvinyl chloride pipe is enlarged.
2. Through mixing the modified resin and the filler, on one hand, the hidden danger brought by the filler in the use process can be avoided, and on the other hand, the chlorinated polyethylene, the white carbon black and the basalt fiber can be fully combined, the white carbon black and the basalt fiber form a net-shaped framework and are combined with the chlorinated polyvinyl chloride, so that the combination property and the impact resistance of the chlorinated polyethylene and the basalt fiber are improved, the influence on the processing property is reduced, and the compression resistance of the polyvinyl chloride pipe is enhanced.
Detailed Description
The technical solutions of the embodiments of the present application will be clearly and completely described below in conjunction with the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments.
Example 1 preparation of ultra-high pressure resistant HPVC pipe
In the embodiment, the polyvinyl chloride adopts the Qilu petrochemical industry, the brand S-1000, the K value is 66-68, and the viscosity number is 80-160ml/g; the mass ratio of the chlorinated polyethylene to the chlorinated polyvinyl chloride is 1:0.4, wherein chlorinated polyethylene adopts medium bridge chemical industry, CPE-135A; chlorinated polyvinyl chloride adopts Shandong chemical and CPVC J-700; white carbon black Q702 is used as the white carbon black.
Preparation of filler
B1. Placing 10 parts by mass of basalt fiber into 0.2mol/L dilute hydrochloric acid solution, stirring for 4 hours, washing with soft water for 3-5 times after stirring is completed, and baking in an oven at 80 ℃ for 3 hours to obtain pretreated basalt fiber;
B2. 10 parts by mass of pretreated basalt fiber is subjected to surface modification by adopting low-temperature plasma, and the conditions of the low-temperature plasma treatment are as follows: taking air as working gas, performing low-temperature plasma treatment for 5-10min under the conditions of 50pa of pressure and 150W of discharge power to obtain modified basalt fiber;
B3. dispersing 5 parts by mass of white carbon black in 10 parts by mass of soft water to form slurry, placing 5 parts by mass of modified basalt fiber into the slurry, adding 0.5 part by mass of silane coupling agent, stirring for 3h, washing with soft water for 3-5 times, and baking in an oven at 80 ℃ for 3h to obtain the filler.
Preparation of super-strong compression-resistant HPVC pipe
A1. Putting 10 parts by mass of chlorinated polyethylene and 4 parts by mass of chlorinated polyvinyl chloride into a high-speed mixer, uniformly stirring, adding 5 parts by mass of filler, and uniformly stirring to obtain a premix;
A2. adding 60 parts by mass of polyvinyl chloride resin into the premix, uniformly stirring, heating to 140-160 ℃, carrying out melt blending, adding 2 parts by mass of calcium zinc stabilizer, 2 parts by mass of methyl methacrylate copolymer, 1 part by mass of polyethylene wax and glycerol monostearate mixture and 0.5 part by mass of methyl methacrylate-butadiene-styrene graft copolymer, uniformly mixing, transferring into a screw extruder, extruding and granulating to obtain a master batch;
A3. and (3) extruding and molding at the temperature of 200 ℃ by using a single screw extruder at the screw speed of 320r/min, and cooling to obtain the ultra-strong compression-resistant HPVC pipe.
Example 2 preparation of ultra-high pressure resistant HPVC pipe
In this example, the raw material of polyvinyl chloride was the same as in example 1; the mass ratio of chlorinated polyethylene to chlorinated polyvinyl chloride and the raw materials were the same as in example 1; white carbon black Q702 is used as the white carbon black.
Preparation of filler
B1. Placing 20 parts by mass of basalt fiber into 0.2mol/L dilute hydrochloric acid solution, stirring for 6 hours, washing with soft water for 3-5 times after stirring is completed, and baking in an oven at 80 ℃ for 4 hours to obtain pretreated basalt fiber;
B2. carrying out surface modification on 20 parts by mass of pretreated basalt fiber by adopting low-temperature plasma, wherein the conditions of the low-temperature plasma treatment are as follows: taking air as working gas, performing low-temperature plasma treatment for 5-10min under the conditions of 50pa of pressure and 150W of discharge power to obtain modified basalt fiber;
B3. dispersing 10 parts by mass of white carbon black in 20 parts by mass of soft water to form slurry, placing 10 parts by mass of modified basalt fiber into the slurry, adding 1.0 part by mass of silane coupling agent, stirring for 5 hours, washing with soft water for 3-5 times, and baking in an oven at 80 ℃ for 4 hours to obtain the filler.
Preparation of super-strong compression-resistant HPVC pipe
A1. Putting 15 parts by mass of chlorinated polyethylene and 6 parts by mass of chlorinated polyvinyl chloride into a high-speed mixer, uniformly stirring, adding 8 parts by mass of filler, and uniformly stirring to obtain a premix;
A2. adding 80 parts by mass of polyvinyl chloride resin into the premix, uniformly stirring, heating to 140-160 ℃, carrying out melt blending, adding 3.6 parts by mass of calcium zinc stabilizer, 2.5 parts by mass of methyl methacrylate copolymer, 1.6 parts by mass of polyethylene wax and glycerol monostearate mixture and 0.8 part by mass of methyl methacrylate-butadiene-styrene graft copolymer, uniformly mixing, transferring into a screw extruder, extruding and granulating to obtain master batch;
A3. and (3) extruding and molding at the temperature of 200 ℃ by using a single screw extruder at the screw speed of 320r/min, and cooling to obtain the ultra-strong compression-resistant HPVC pipe.
Example 3 preparation of ultra-high pressure resistant HPVC pipe
In this example, the raw material of polyvinyl chloride was the same as in example 1; the mass ratio of chlorinated polyethylene to chlorinated polyvinyl chloride and the raw materials were the same as in example 1; white carbon black Q702 is used as the white carbon black.
Preparation of filler
B1. Placing 30 parts by mass of basalt fiber into 0.2mol/L dilute hydrochloric acid solution, stirring for 8 hours, washing with soft water for 3-5 times after stirring is completed, and baking in an oven at 80 ℃ for 5 hours to obtain pretreated basalt fiber;
B2. carrying out surface modification on 30 parts by mass of pretreated basalt fiber by adopting low-temperature plasma, wherein the conditions of the low-temperature plasma treatment are as follows: taking air as working gas, performing low-temperature plasma treatment for 5-10min under the conditions of 50pa of pressure and 150W of discharge power to obtain modified basalt fiber;
B3. dispersing 20 parts by mass of white carbon black in 35 parts by mass of soft water to form slurry, placing 15 parts by mass of modified basalt fiber into the slurry, adding 1.8 parts by mass of silane coupling agent, stirring for 7h, washing with soft water for 3-5 times, and baking in an oven at 80 ℃ for 5h to obtain the filler.
Preparation of super-strong compression-resistant HPVC pipe
A1. Putting 20 parts by mass of chlorinated polyethylene and 8 parts by mass of chlorinated polyvinyl chloride into a high-speed mixer, uniformly stirring, adding 12 parts by mass of filler, and uniformly stirring to obtain a premix;
A2. adding 90 parts by mass of polyvinyl chloride resin into the premix, uniformly stirring, heating to 140-160 ℃, carrying out melt blending, adding 4.5 parts by mass of calcium zinc stabilizer, 3 parts by mass of methyl methacrylate copolymer, 2 parts by mass of polyethylene wax and glyceryl monostearate mixture and 1 part by mass of methyl methacrylate-butadiene-styrene graft copolymer, uniformly mixing, transferring into a screw extruder, extruding and granulating to obtain a master batch;
A3. and (3) extruding and molding at the temperature of 200 ℃ by using a single screw extruder at the screw speed of 320r/min, and cooling to obtain the ultra-strong compression-resistant HPVC pipe.
Example 4 (comparative example 1), preparation of ultra-high pressure resistant HPVC pipe
In this example, the raw material of polyvinyl chloride was the same as in example 1; the mass ratio of chlorinated polyethylene to chlorinated polyvinyl chloride and the raw materials were the same as in example 1; the white carbon black adopts white carbon black Q702, and the mass ratio of the basalt short fiber to the white carbon black is 1:1.
Preparation of super-strong compression-resistant HPVC pipe
A1. Putting 20 parts by mass of chlorinated polyethylene and 8 parts by mass of chlorinated polyvinyl chloride into a high-speed mixer, uniformly stirring, adding 12 parts by mass of a mixture of white carbon black and basalt short fibers, and uniformly stirring to obtain a premix;
A2. adding 90 parts by mass of polyvinyl chloride resin into the premix, uniformly stirring, heating to 140-160 ℃, carrying out melt blending, adding 4.5 parts by mass of calcium zinc stabilizer, 3 parts by mass of methyl methacrylate copolymer, 2 parts by mass of polyethylene wax and glyceryl monostearate mixture and 1 part by mass of methyl methacrylate-butadiene-styrene graft copolymer, uniformly mixing, transferring into a screw extruder, extruding and granulating to obtain a master batch;
A3. and (3) extruding and molding at the temperature of 200 ℃ by using a single screw extruder at the screw speed of 320r/min, and cooling to obtain the ultra-strong compression-resistant HPVC pipe.
Example 5 (comparative example 2) preparation of ultra-high pressure resistant HPVC pipe
In this example, the raw material of polyvinyl chloride was the same as in example 1; the mass ratio of chlorinated polyethylene to chlorinated polyvinyl chloride and the raw materials were the same as in example 1; the filler adopts basalt short fiber.
A1. Putting 20 parts by mass of chlorinated polyethylene and 8 parts by mass of chlorinated polyvinyl chloride into a high-speed mixer, uniformly stirring, adding 12 parts by mass of basalt short fibers, and uniformly stirring to obtain a premix;
A2. adding 90 parts by mass of polyvinyl chloride resin into the premix, uniformly stirring, heating to 140-160 ℃, carrying out melt blending, adding 4.5 parts by mass of calcium zinc stabilizer, 3 parts by mass of methyl methacrylate copolymer, 2 parts by mass of polyethylene wax and glyceryl monostearate mixture and 1 part by mass of methyl methacrylate-butadiene-styrene graft copolymer, uniformly mixing, transferring into a screw extruder, extruding and granulating to obtain a master batch;
A3. and (3) extruding and molding at the temperature of 200 ℃ by using a single screw extruder at the screw speed of 320r/min, and cooling to obtain the ultra-strong compression-resistant HPVC pipe.
Example 6 (comparative example 3), preparation of ultra-high pressure resistant HPVC pipe six
In this example, the raw material of polyvinyl chloride was the same as in example 1; the mass ratio of chlorinated polyethylene to chlorinated polyvinyl chloride and the raw materials were the same as in example 1; the filler adopts white carbon black.
A1. Putting 20 parts by mass of chlorinated polyethylene and 8 parts by mass of chlorinated polyvinyl chloride into a high-speed mixer, uniformly stirring, adding 12 parts by mass of white carbon black, and uniformly stirring to obtain a premix;
A2. adding 90 parts by mass of polyvinyl chloride resin into the premix, uniformly stirring, heating to 140-160 ℃, carrying out melt blending, adding 4.5 parts by mass of calcium zinc stabilizer, 3 parts by mass of methyl methacrylate copolymer, 2 parts by mass of polyethylene wax and glyceryl monostearate mixture and 1 part by mass of methyl methacrylate-butadiene-styrene graft copolymer, uniformly mixing, transferring into a screw extruder, extruding and granulating to obtain a master batch;
A3. and (3) extruding and molding at the temperature of 200 ℃ by using a single screw extruder at the screw speed of 320r/min, and cooling to obtain the ultra-strong compression-resistant HPVC pipe.
Example 7 (comparative example 4), preparation of ultra-high pressure resistant HPVC pipe seven
In the embodiment, the polyvinyl chloride adopts the Qilu petrochemical industry, the brand S-1000, the K value is 66-68, and the viscosity number is 80-160ml/g; the modified resin adopts chlorinated polyethylene, the chlorinated polyethylene adopts medium-bridge chemical industry, CPE-135A; the filler prepared in example 3 was used as the filler.
Preparation of super-strong compression-resistant HPVC pipe
A1. Putting 20 parts by mass of chlorinated polyethylene into a high-speed mixer, uniformly stirring, adding 12 parts by mass of filler, and uniformly stirring to obtain a premix;
A2. adding 90 parts by mass of polyvinyl chloride resin into the premix, uniformly stirring, heating to 140-160 ℃, carrying out melt blending, adding 4.5 parts by mass of calcium zinc stabilizer, 3 parts by mass of methyl methacrylate copolymer, 2 parts by mass of polyethylene wax and glyceryl monostearate mixture and 1 part by mass of methyl methacrylate-butadiene-styrene graft copolymer, uniformly mixing, transferring into a screw extruder, extruding and granulating to obtain a master batch;
A3. and (3) extruding and molding at the temperature of 200 ℃ by using a single screw extruder at the screw speed of 320r/min, and cooling to obtain the ultra-strong compression-resistant HPVC pipe.
Example 8 (comparative example 5), preparation of ultra-high pressure resistant HPVC pipe
In the embodiment, the polyvinyl chloride adopts the Qilu petrochemical industry, the brand S-1000, the K value is 66-68, and the viscosity number is 80-160ml/g; the filler prepared in example 3 was used as the filler.
Preparation of super-strong compression-resistant HPVC pipe
A2. Putting 90 parts by mass of polyvinyl chloride resin into a high-speed mixer, uniformly stirring, adding 20 parts by mass of chlorinated polyethylene and 12 parts by mass of filler, uniformly stirring, heating to 140-160 ℃, carrying out melt blending, adding 4.5 parts by mass of calcium-zinc stabilizer, 3 parts by mass of methyl methacrylate copolymer, 2 parts by mass of polyethylene wax and glycerol monostearate mixture and 1 part by mass of methyl methacrylate-butadiene-styrene graft copolymer, uniformly mixing, transferring into a screw extruder, extruding and granulating to obtain master batch;
A3. and (3) extruding and molding at the temperature of 200 ℃ by using a single screw extruder at the screw speed of 320r/min, and cooling to obtain the ultra-strong compression-resistant HPVC pipe.
Example 9 (comparative example 6), preparation of ultra-high pressure resistant HPVC pipe nine
In this example, the raw material of polyvinyl chloride was the same as in example 1; the mass ratio of chlorinated polyethylene to chlorinated polyvinyl chloride and the raw materials were the same as in example 1;
preparation of super-strong compression-resistant HPVC pipe
A2. Putting 90 parts by mass of polyvinyl chloride resin into a high-speed mixer, uniformly stirring, adding 20 parts by mass of chlorinated polyethylene and 8 parts by mass of chlorinated polyvinyl chloride, uniformly stirring, heating to 140-160 ℃, carrying out melt blending, adding 4.5 parts by mass of a calcium-zinc stabilizer, 3 parts by mass of a methyl methacrylate copolymer, 2 parts by mass of a mixture of polyethylene wax and glycerol monostearate and 1 part by mass of a methyl methacrylate-butadiene-styrene graft copolymer, uniformly mixing, transferring into a screw extruder, extruding and granulating to obtain a master batch;
A3. and (3) extruding and molding at the temperature of 200 ℃ by using a single screw extruder at the screw speed of 320r/min, and cooling to obtain the ultra-strong compression-resistant HPVC pipe.
Physical properties of HPVC pipes prepared in examples 1 to 9 were measured;
tensile strength in GB/T1040, vicat softening point in GB/T1633; the longitudinal retractive rate is tested by GB/T6671-2001, and the ring stiffness is tested by a conventional test method; each set of data was tested 5 times and averaged. The drop weight impact was performed by fixing the pipes of the above examples and comparative examples to the ground, then dropping a 20Kg conical weight from a height of 5m to the sample pipe, and determining the height of the weight causing the breakage of the sample pipe as the drop weight height. At this time, the higher the drop height is, the better the drop strength is;
the test results are shown in Table 1:
as can be seen from the data in Table 1, the HPVC pipes prepared in examples 1-3 of the present application have better tensile strength and drop impact strength, and the Vicat softening point temperature and the longitudinal retraction rate are significantly improved, and the HPVC pipe prepared in example 3 has better tensile strength and Vicat softening point temperature and ring stiffness than the ordinary PVC pipe in terms of comprehensive performance.
Comparison of the data in example 3 and example 4 shows that the tensile strength and low temperature drop weight test of HPVC pipe can be improved, i.e. the compression resistance of HPVC pipe can be improved, by modifying the filler.
As can be seen from the comparison of the data in examples 3 and examples 5-6, the use of the modified filler can improve the tensile strength, the longitudinal retraction rate and the ring stiffness of the HPVC pipe, and the drop test effect is better than the use of basalt fiber or white carbon black alone.
As can be seen from the comparison of the data in examples 3 and examples 7-9, the use of the combination of chlorinated polyethylene and chlorinated polyvinyl chloride can improve the tensile strength, vicat softening point temperature and longitudinal retraction rate of HPVC pipe and the drop test effect is better than the use of either chlorinated polyethylene or chlorinated polyvinyl chloride alone or without chlorinated polyethylene and chlorinated polyvinyl chloride.
The super-strong compression-resistant HPVC pipe and the preparation method thereof provided by the application are described in detail. The description of the specific embodiments is only intended to aid in understanding the method of the present application and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the application can be made without departing from the principles of the application and these modifications and adaptations are intended to be within the scope of the application as defined in the following claims.
What needs to be specifically stated is: the specific experimental procedures or conditions are not noted in the examples and may be followed by the operations or conditions of conventional experimental procedures described in the literature in this field. The reagents or apparatus used were conventional reagent products commercially available without the manufacturer's knowledge.
The above examples are provided for better understanding of the present application, and are not limited to the preferred embodiments, but are not limited to the content and scope of the present application, and any product which is the same or similar to the present application obtained by any person who is in the light of the present application or combines the present application with other features of the prior art falls within the scope of the present application.
Claims (10)
1. The super-strong compression-resistant HPVC pipe is characterized by comprising the following raw materials in parts by weight: 60-90 parts of polyvinyl chloride resin, 10-30 parts of modified resin, 5-12 parts of filler, 1-5 parts of heat stabilizer, 2-3 parts of processing modification auxiliary agent, 1-2 parts of lubricant and 0.5-1 part of impact modification auxiliary agent.
2. A super strength compression resistant HPVC pipe according to claim 1, wherein said polyvinyl chloride resin has a K value of 60-68 and a viscosity number of 60-200ml/g.
3. The ultra-strong compression-resistant HPVC pipe of claim 1, wherein the modified resin is a mixture of chlorinated polyethylene and chlorinated polyvinyl chloride, and the mass ratio of the chlorinated polyethylene to the chlorinated polyvinyl chloride is 1: (0.2-0.5).
4. The super high pressure resistant HPVC pipe of claim 1, wherein said filler is modified basalt fiber and white carbon black, said filler is prepared by the steps of:
B1. placing basalt fibers in a dilute acid solution, stirring for 4-8 hours, washing and drying after stirring is completed to obtain pretreated basalt fibers;
B2. carrying out surface modification on the pretreated basalt fiber by adopting low-temperature plasma to obtain modified basalt fiber;
B3. pre-dispersing white carbon black into slurry through water, then placing modified basalt fiber into the slurry, adding a silane coupling agent, stirring for 3-7h, washing and drying to obtain the filler.
5. The ultra-strong compression resistant HPVC pipe according to claim 4, wherein the low temperature plasma treatment conditions in step S2 are: and (3) taking air as working gas, and performing low-temperature plasma treatment for 5-10min under the conditions of 50pa of pressure and 150W of discharge power.
6. The ultra-strong compression resistant HPVC pipe according to claim 4, wherein the white carbon black is one of precipitated silica, fumed silica and ultra-fine silica gel.
7. The HPVC pipe of claim 4, wherein the drying in steps S1 and S3 is performed at 80 ℃ for 3-5 hours.
8. The ultra-strong compression-resistant HPVC pipe of claim 1, wherein the heat stabilizer is an environment-friendly calcium zinc stabilizer, the processing modification auxiliary agent is methyl methacrylate copolymer, the impact modification auxiliary agent is one of ARC impact modifier, MBS impact modifier, methyl methacrylate-butadiene-styrene graft copolymer, chlorinated polyethylene and ethylene-vinyl acetate copolymer, and the lubricant is one or a combination of several of stearic acid, oxidized polyethylene wax, glyceryl monostearate, glyceryl distearate or pentaerythritol monostearate.
9. A method of making a super-strong compression resistant HPVC pipe according to any one of claims 1 to 8 comprising the steps of:
A1. putting the modified resin into a high-speed mixer, uniformly stirring, adding the filler, and uniformly stirring to obtain a premix;
A2. adding polyvinyl chloride resin into the premix, uniformly stirring, heating to 140-160 ℃, carrying out melt blending, adding a heat stabilizer, a processing modification auxiliary agent, a lubricant and an impact modification auxiliary agent, uniformly mixing, transferring into a screw extruder, extruding, and granulating to obtain a master batch;
A3. adding the master batch into a single screw extruder, extruding, and cooling to obtain the ultra-strong compression-resistant HPVC pipe.
10. The method for producing a super-strong compression-resistant HPVC pipe according to claim 9, wherein in the A3 step, the rotation speed of the single screw extruder is 250-350r/min.
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