CN113683830A - Corrosion-resistant polyethylene material for drain pipe and preparation method thereof - Google Patents
Corrosion-resistant polyethylene material for drain pipe and preparation method thereof Download PDFInfo
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- -1 polyethylene Polymers 0.000 title claims abstract description 96
- 239000004698 Polyethylene Substances 0.000 title claims abstract description 62
- 229920000573 polyethylene Polymers 0.000 title claims abstract description 62
- 239000000463 material Substances 0.000 title claims abstract description 60
- 230000007797 corrosion Effects 0.000 title claims abstract description 29
- 238000005260 corrosion Methods 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 229920001971 elastomer Polymers 0.000 claims abstract description 39
- 239000000806 elastomer Substances 0.000 claims abstract description 38
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 25
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 24
- 238000013508 migration Methods 0.000 claims abstract description 22
- 230000005012 migration Effects 0.000 claims abstract description 20
- 229920001684 low density polyethylene Polymers 0.000 claims abstract description 15
- 239000004702 low-density polyethylene Substances 0.000 claims abstract description 15
- 229920001903 high density polyethylene Polymers 0.000 claims abstract description 14
- 239000004700 high-density polyethylene Substances 0.000 claims abstract description 14
- 239000003365 glass fiber Substances 0.000 claims abstract description 12
- 239000000314 lubricant Substances 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 7
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 87
- 238000006243 chemical reaction Methods 0.000 claims description 61
- 238000003756 stirring Methods 0.000 claims description 59
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 54
- 229920001558 organosilicon polymer Polymers 0.000 claims description 40
- 238000001816 cooling Methods 0.000 claims description 32
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 28
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 27
- 239000013067 intermediate product Substances 0.000 claims description 27
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 24
- 238000002156 mixing Methods 0.000 claims description 23
- 238000005406 washing Methods 0.000 claims description 21
- 238000010438 heat treatment Methods 0.000 claims description 20
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 19
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 19
- 238000001035 drying Methods 0.000 claims description 17
- 238000002390 rotary evaporation Methods 0.000 claims description 15
- 238000007789 sealing Methods 0.000 claims description 15
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 14
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims description 14
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 13
- VHYFNPMBLIVWCW-UHFFFAOYSA-N 4-Dimethylaminopyridine Chemical compound CN(C)C1=CC=NC=C1 VHYFNPMBLIVWCW-UHFFFAOYSA-N 0.000 claims description 12
- 238000001914 filtration Methods 0.000 claims description 12
- NAQMVNRVTILPCV-UHFFFAOYSA-N hexane-1,6-diamine Chemical compound NCCCCCCN NAQMVNRVTILPCV-UHFFFAOYSA-N 0.000 claims description 12
- 229920001296 polysiloxane Polymers 0.000 claims description 12
- 229960000583 acetic acid Drugs 0.000 claims description 11
- MGNCLNQXLYJVJD-UHFFFAOYSA-N cyanuric chloride Chemical compound ClC1=NC(Cl)=NC(Cl)=N1 MGNCLNQXLYJVJD-UHFFFAOYSA-N 0.000 claims description 11
- 239000008096 xylene Substances 0.000 claims description 11
- OFTKFKYVSBNYEC-UHFFFAOYSA-N 2-furoyl chloride Chemical compound ClC(=O)C1=CC=CO1 OFTKFKYVSBNYEC-UHFFFAOYSA-N 0.000 claims description 10
- NIZBFFOETCKGBI-UHFFFAOYSA-N 1-hydroxy-2,2,3,3,4-pentamethylpiperidine Chemical compound CC1CCN(O)C(C)(C)C1(C)C NIZBFFOETCKGBI-UHFFFAOYSA-N 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 239000012299 nitrogen atmosphere Substances 0.000 claims description 7
- 239000012043 crude product Substances 0.000 claims description 6
- 239000012362 glacial acetic acid Substances 0.000 claims description 6
- 238000007792 addition Methods 0.000 claims description 3
- 238000000967 suction filtration Methods 0.000 claims description 3
- BWZHKRSSCFRVIE-UHFFFAOYSA-N 1-n,4-n-dimethyl-2h-pyridine-1,4-diamine Chemical compound CNN1CC=C(NC)C=C1 BWZHKRSSCFRVIE-UHFFFAOYSA-N 0.000 claims description 2
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 claims description 2
- 229920005573 silicon-containing polymer Polymers 0.000 claims 2
- 239000002131 composite material Substances 0.000 abstract description 14
- 238000005286 illumination Methods 0.000 abstract description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 54
- 239000000243 solution Substances 0.000 description 53
- 229910052757 nitrogen Inorganic materials 0.000 description 26
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 14
- 230000032683 aging Effects 0.000 description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 11
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 10
- 238000012360 testing method Methods 0.000 description 10
- 239000003054 catalyst Substances 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 9
- 238000011049 filling Methods 0.000 description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 8
- 238000000502 dialysis Methods 0.000 description 8
- HQKMJHAJHXVSDF-UHFFFAOYSA-L magnesium stearate Chemical compound [Mg+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O HQKMJHAJHXVSDF-UHFFFAOYSA-L 0.000 description 8
- 239000012074 organic phase Substances 0.000 description 8
- MDWVSAYEQPLWMX-UHFFFAOYSA-N 4,4'-Methylenebis(2,6-di-tert-butylphenol) Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 MDWVSAYEQPLWMX-UHFFFAOYSA-N 0.000 description 7
- YLQBMQCUIZJEEH-UHFFFAOYSA-N Furan Chemical group C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 7
- 239000000377 silicon dioxide Substances 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 description 6
- 239000012975 dibutyltin dilaurate Substances 0.000 description 6
- 235000012239 silicon dioxide Nutrition 0.000 description 6
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical class [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 5
- 239000007864 aqueous solution Substances 0.000 description 5
- 239000008367 deionised water Substances 0.000 description 5
- 229910021641 deionized water Inorganic materials 0.000 description 5
- 239000000706 filtrate Substances 0.000 description 5
- 239000012044 organic layer Substances 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 239000002904 solvent Substances 0.000 description 5
- 239000002981 blocking agent Substances 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 4
- 239000003431 cross linking reagent Substances 0.000 description 4
- 238000010790 dilution Methods 0.000 description 4
- 239000012895 dilution Substances 0.000 description 4
- 230000003179 granulation Effects 0.000 description 4
- 238000005469 granulation Methods 0.000 description 4
- 235000019359 magnesium stearate Nutrition 0.000 description 4
- 238000001291 vacuum drying Methods 0.000 description 4
- 125000003277 amino group Chemical group 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 230000000875 corresponding effect Effects 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 125000003386 piperidinyl group Chemical group 0.000 description 3
- 239000011780 sodium chloride Substances 0.000 description 3
- GPXCORHXFPYJEH-UHFFFAOYSA-N 3-[[3-aminopropyl(dimethyl)silyl]oxy-dimethylsilyl]propan-1-amine Chemical group NCCC[Si](C)(C)O[Si](C)(C)CCCN GPXCORHXFPYJEH-UHFFFAOYSA-N 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- CEGOLXSVJUTHNZ-UHFFFAOYSA-K aluminium tristearate Chemical compound [Al+3].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CEGOLXSVJUTHNZ-UHFFFAOYSA-K 0.000 description 2
- 229940063655 aluminum stearate Drugs 0.000 description 2
- 239000012298 atmosphere Substances 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000011256 inorganic filler Substances 0.000 description 2
- 229910003475 inorganic filler Inorganic materials 0.000 description 2
- 238000003760 magnetic stirring Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 2
- 238000003878 thermal aging Methods 0.000 description 2
- GETQZCLCWQTVFV-UHFFFAOYSA-N trimethylamine Chemical compound CN(C)C GETQZCLCWQTVFV-UHFFFAOYSA-N 0.000 description 2
- 238000003828 vacuum filtration Methods 0.000 description 2
- PEEHTFAAVSWFBL-UHFFFAOYSA-N Maleimide Chemical compound O=C1NC(=O)C=C1 PEEHTFAAVSWFBL-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000007259 addition reaction Methods 0.000 description 1
- 229940059260 amidate Drugs 0.000 description 1
- 239000003242 anti bacterial agent Substances 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 1
- DCHAXMMNBKFCEF-UHFFFAOYSA-M benzyl(trimethyl)azanium;methanol;hydroxide Chemical compound [OH-].OC.C[N+](C)(C)CC1=CC=CC=C1 DCHAXMMNBKFCEF-UHFFFAOYSA-M 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 125000001309 chloro group Chemical group Cl* 0.000 description 1
- 239000004595 color masterbatch Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 238000007323 disproportionation reaction Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 230000006353 environmental stress Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- NPUKDXXFDDZOKR-LLVKDONJSA-N etomidate Chemical compound CCOC(=O)C1=CN=CN1[C@H](C)C1=CC=CC=C1 NPUKDXXFDDZOKR-LLVKDONJSA-N 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 150000008282 halocarbons Chemical class 0.000 description 1
- 238000003898 horticulture Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000003317 industrial substance Substances 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 125000005439 maleimidyl group Chemical group C1(C=CC(N1*)=O)=O 0.000 description 1
- GBMDVOWEEQVZKZ-UHFFFAOYSA-N methanol;hydrate Chemical compound O.OC GBMDVOWEEQVZKZ-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 238000010525 oxidative degradation reaction Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000007151 ring opening polymerisation reaction Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 239000012745 toughening agent Substances 0.000 description 1
- 238000005292 vacuum distillation Methods 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/42—Block-or graft-polymers containing polysiloxane sequences
- C08G77/452—Block-or graft-polymers containing polysiloxane sequences containing nitrogen-containing sequences
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/062—HDPE
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/066—LDPE (radical process)
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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)
- Silicon Polymers (AREA)
Abstract
The invention discloses a corrosion-resistant polyethylene material for a drain pipe and a preparation method thereof, and belongs to the technical field of polyethylene pipes. The polyethylene material comprises the following raw materials in parts by weight: 63-87 parts of high-density polyethylene, 15-27 parts of low-density polyethylene, 8-16 parts of elastomer, 2-5 parts of modified glass fiber, 1.5-3.5 parts of migration-resistant antioxidant and 2-4 parts of lubricant. The elastomer contains DA rings and has thermal self-repairing property, and after the elastomer is introduced into the polyethylene base material, the toughness of the composite material is increased on one hand, and the heat-resistant environment change of the toughness of the composite material is increased on the other hand; and the elastomer has a blocked structure, and after the elastomer is introduced into the polyethylene base material, the light stability of the composite material is increased, so that the toughness of the composite material is slightly influenced by illumination, and the problem that the toughness of the polyethylene material is reduced due to the influence of illumination or ambient temperature is solved.
Description
Technical Field
The invention belongs to the technical field of polyethylene pipes, and particularly relates to a corrosion-resistant polyethylene material for a drain pipe and a preparation method thereof.
Background
Polyethylene is a highly crystalline, non-polar thermoplastic resin that has excellent resistance to most domestic and industrial chemicals, such as chemical attack by certain types of chemicals, such as corrosive oxidants (concentrated nitric acid), aromatic hydrocarbons (xylene) and halogenated hydrocarbons (carbon tetrachloride), and is lightweight and non-toxic. Thus, polyethylene has a very wide range of applications in pipes, such as storm water drains and other sewer lines. The polyethylene drain pipe is widely applied to the fields of drainage such as highways, railway roadbeds, subway engineering, waste landfill sites, tunnels, green belts, playgrounds, slope protection caused by high water content and the like, and irrigation and drainage systems of agriculture and horticulture.
However, in the existing polyethylene drain pipe, inorganic filler is added in the production process to increase the hardness of the polyethylene drain pipe, and the addition of the inorganic filler often causes the toughness of the polyethylene drain pipe to be poor; meanwhile, the aging speed of the polyethylene drain pipe is high under the condition of illumination or heating, and the molecular chain of the polyethylene polymer generates structures such as branching, disproportionation, crosslinking and the like due to oxidative degradation, crosslinking, auxiliary agent migration and the like, so that the performance of the polyethylene in all aspects is reduced. Therefore, studies have been made to solve the above problems.
For example, chinese patent CN102276892A discloses a method for preparing polyethylene pipe resin, which comprises mixing recycled high density polyethylene, low density polyethylene, color masterbatch, cross-linking agent or antioxidant, performing a melting reaction to obtain an intermediate, mixing the intermediate with an antibacterial agent or cross-linking agent, and performing a melting reaction to obtain a target product, wherein the cross-linking agent and the antioxidant are added in different melting steps for reaction, so as to improve the stability and environmental stress cracking resistance of the pipe resin. For example, chinese patent CN112321932A discloses a production process of an environment-friendly high-toughness polyethylene drainage pipeline, which comprises mixing and granulating a polyethylene reclaimed material, a cross-linking agent and an antioxidant a in a proportion, then mixing the cross-linked modified polyethylene reclaimed granules with an antioxidant B and a toughening agent POE, and granulating again to obtain polyethylene with excellent mechanical strength and aging resistance. However, in both of the above inventions, the modified recycled material is used as a base material to be mixed with a new low-density polyethylene material, and the corresponding aging resistance is still not ideal, and the toughness is reduced by the influence of light or environmental temperature, which causes the brittle cracking of the drain pipe. Therefore, there is a need for a corrosion-resistant polyethylene material for drain pipes having good aging resistance.
Disclosure of Invention
The invention aims to provide a corrosion-resistant polyethylene material for a drain pipe and a preparation method thereof.
The technical problems to be solved by the invention are as follows: the toughness of the polyethylene for the existing drain pipe is affected by illumination or environmental temperature and becomes small.
The purpose of the invention can be realized by the following technical scheme:
the corrosion-resistant polyethylene material for the drain pipe comprises the following raw materials in parts by weight: 63-87 parts of high-density polyethylene, 15-27 parts of low-density polyethylene, 8-16 parts of elastomer, 2-5 parts of modified glass fiber, 1.5-3.5 parts of migration-resistant antioxidant and 2-4 parts of lubricant.
Further, the elastomer is made by the steps of:
step S1, adding cyanuric chloride and acetone into a four-neck flask with a stirrer, a condenser tube, a thermometer and a dropping funnel, continuously stirring for 15min in an ice bath, then slowly dropping an acetone solution containing pentamethylpiperidinol by using the dropping funnel at the temperature of 0-5 ℃, wherein the dropping speed is 1-2 drops/second, continuously stirring for 2-3h after complete dropping, adjusting the pH value of the system by using a 10% sodium hydroxide solution in the reaction process, keeping the pH value of the system between 6 and 7, finally obtaining a reaction solution, cooling the reaction solution to room temperature, carrying out vacuum filtration, washing for 2-3 times by using acetone, drying in a vacuum drying box to constant weight, and obtaining an intermediate product 1, wherein the molar ratio of cyanuric chloride to pentamethylpiperidinol is 1: 1.1-1.3;
the structural formula of intermediate 1 is shown below:
in the reaction process, chlorine of cyanuric chloride is utilized to react with hydroxyl in pentamethylpiperidinol to form substituted cyanuric chloride with a hindered amine structure, namely an intermediate product 1;
step S2, placing the intermediate product 1, amino-terminated polydimethylsiloxane and xylene into a reaction kettle, sealing, replacing air in the kettle with nitrogen for 2-3 times, filling nitrogen to 0.6MPa, heating to 78 ℃, stirring for 3 hours, cooling, opening the reaction kettle, adding a sodium hydroxide solution with the mass fraction of 20%, sealing again, replacing air in the kettle with nitrogen for 2-3 times, filling nitrogen to 0.6MPa, heating to 135 ℃, reacting for 3 hours, cooling, opening the reaction kettle, adding a hexamethylenediamine end-capping agent and a sodium hydroxide solution with the mass fraction of 20%, sealing again, replacing air in the kettle with nitrogen for 2-3 times, filling nitrogen to 0.6MPa, heating to 135 ℃, reacting for 1 hour, cooling, opening the reaction kettle, adding xylene for dilution, separating liquid, washing an organic phase with a sodium chloride solution with the mass fraction of 10% for 2-3 times, taking organic phase for vacuum distillation, then, a dialysis bag is used for intercepting molecules with the molecular weight of 2500-3000, and the dialysis is carried out for 2-3 times to obtain the amino-terminated organic silicon polymer, wherein the ratio of the using amount of the intermediate product 1, the using amount of the amino-terminated polydimethylsiloxane, the total using amount of sodium hydroxide solutions at two times, the using amount of the ethylenediamine and the using amount of the dimethylbenzene is 0.1 mol: 0.1 mol: 20-40 mL: 0.1 mol: 250-400mL, the dosage of the two sodium hydroxide solutions is equal, and the relative molecular mass of the amino-terminated polydimethylsiloxane is 1000-1500;
the molecular structural formula of the amino-terminated organosilicon polymer is shown as follows:
in the reaction, the polymerization reaction of chlorine atoms contained in cyanuric chloride contained in the intermediate product 1 and amino in amino-terminated polydimethylsiloxane is carried out in a reaction kettle, and finally, the chlorine on the hexamethylene diamine and piperidine ring is used for reaction, so that the amino-terminated organosilicon polymer is finally obtained;
step S3, adding the amino-terminated organosilicon polymer and anhydrous dichloromethane into a four-neck flask with a stirrer, a condenser tube, a thermometer and a dropping funnel, adding triethylamine under the atmosphere of 0 ℃ and nitrogen, stirring and mixing for 1h, adding 4-dimethylaminopyridine, dropwise adding an anhydrous dichloromethane solution of 2-furoyl chloride by using the dropping funnel, continuously stirring and reacting for 3h, heating to 20-25 ℃, continuously stirring and reacting for 48h, filtering, continuously washing the filtrate with a saturated sodium bicarbonate aqueous solution and deionized water, drying an organic layer with anhydrous magnesium sulfate, and removing a solvent by rotary evaporation to obtain the furan-terminated organosilicon polymer, wherein the molar ratio of the amino-terminated organosilicon polymer to the triethylamine to the 2-furoyl chloride is 1: 1-1.3: the adding mass of the 1, 4-dimethylamino pyridine is 1-3% of the mass of the amino-terminated organosilicon polymer;
the molecular structural formula of the furan-terminated organosilicon polymer is shown as follows:
in the reaction, the reaction of amino in the amino-terminated organosilicon polymer and 2-furoyl chloride is utilized to amidate the amino, so that furan rings are connected into the amino-terminated organosilicon polymer to provide a reaction group for subsequent reaction;
step S4, adding the maleic anhydride solid into glacial acetic acid solution of amino polysiloxane, fully stirring for 2 hours at room temperature to completely dissolve the maleic anhydride, then stirring for 6 hours at 138 ℃, cooling to room temperature, removing acetic acid by rotary evaporation, re-dissolving the crude product into dichloromethane, continuously washing for 2-3 times by using saturated sodium chloride solution, drying and filtering by using anhydrous magnesium sulfate, and then removing dichloromethane by rotary evaporation to obtain an intermediate product 2, wherein the molar ratio of the maleic anhydride to the amino polysiloxane is 1.5-2: 1;
the molecular structure of intermediate 2 is shown below:
the polysiloxane is maleimide functionalized by reacting the amino groups of the aminopolysiloxane with maleic anhydride in the above reaction;
step S5, uniformly mixing the furan-terminated organosilicon polymer, the intermediate product 2 and dichloromethane, stirring and reacting at 83 ℃ for 12h, and cooling to room temperature to obtain the elastomer, wherein the use amount ratio of the furan-terminated organosilicon polymer to the intermediate product 2 is 50-80: 25-35.
In the above reaction, the formation of DA ring is carried out by reacting furan in furan-terminated organosilicon polymer with maleimide in intermediate 2
The DA ring has thermal reversibility, so that the resulting elastomer has thermal self-healing properties.
Further, the amino-terminated polydimethylsiloxane is prepared by the following steps:
under the protection of nitrogen gas flow, adding D4 and a catalyst benzyl trimethyl amine hydroxide methanol solution (0.5 wt%), heating to 43 ℃ under magnetic stirring, adding a blocking agent, removing residual water and methanol in the system under reduced pressure, continuing an equilibrium reaction for 10 hours when the viscosity of the system is not changed, continuing to raise the temperature to 172 ℃ to destroy the activity of a catalytic center, then cooling to 150 ℃, removing the residual D4 monomer and low-boiling-point substance micromolecules in the reaction under negative pressure to obtain amino-terminated polydimethylsiloxane, wherein the blocking agent is 1, 3-bis (3-aminopropyl) -1,1,3, 3-tetramethyl disiloxane, and the dosage ratio of the D4, the catalyst and the blocking agent is 50 g: 0.5 g: 4-8 g.
Further, the specific acid etching method for the modified glass fiber refers to journal, composite material journal, volume 28, phase 4, 2011, pages 8, month 34-39.
Further, the migration resistant antioxidant is prepared by the following steps:
putting silicon dioxide into a triangular flask, then adding an antioxidant 702, then adding an ethanol solution of dibutyltin dilaurate catalyst, stirring and reacting for 4 hours at the temperature of 65 ℃ to obtain a migration-resistant antioxidant, wherein the mass ratio of the silicon dioxide to the antioxidant 702 is controlled to be 20 g: 1-3g of dibutyltin dilaurate catalyst, wherein the mass of the added dibutyltin dilaurate catalyst is 1-3% of the mass of the antioxidant 702.
A preparation method of a corrosion-resistant polyethylene material for a drain pipe comprises the following steps:
step one, stirring and mixing high-density polyethylene, low-density polyethylene and elastomer for 10-15min at the temperature of 150-;
and step two, feeding the mixed material into a granulator for granulation, and controlling the temperature of a charging barrel of the granulator to be 170-190 ℃ to obtain the corrosion-resistant polyethylene material for the drain pipe.
The invention has the beneficial effects that:
the invention introduces the elastomer into the polyethylene base material (formed by mixing high-density polyethylene and low-density polyethylene), the elastomer is formed by the furan end-capped organosilicon polymer, maleic anhydride and amino polysiloxane through the gradual reaction, the elastomer contains DA rings through the reaction and has the thermal self-repairing property, therefore, after the elastomer is introduced into the polyethylene base material, on one hand, the elastomer is an organosilicon material, and a large number of silica single bonds exist, so that a large number of hydrogen bonds are formed in the composite material, thereby increasing the toughness of the composite material, on the other hand, the elastomer has the thermal self-repairing property, the heat-resistant environment change of the toughness of the composite material is increased, so that the toughness of the composite material is less influenced in the alternate change of hot and cold environments, which is explained that the DA rings in the composite material have the thermal reversibility, and when the DA rings absorb heat to be decomposed in the hot environment, under the low-temperature environment, addition reaction occurs, heat is released, and the change of molecular chains due to the influence of energy is reduced; the furan-terminated organosilicon polymer is formed by the gradual reaction of cyanuric chloride, pentamethylpiperidinol, amino-terminated polydimethylsiloxane and 2-furoyl chloride, and the terminated furan ring and piperidine ring are simultaneously introduced into the furan-terminated organosilicon polymer through the reaction, the terminated furan ring is prepared for introducing a DA ring into a subsequent elastomer, and the piperidine ring has a hindered amine structure and has light stability, so that the elastomer has a hindered structure, and the light stability of the composite material is improved after the elastomer is introduced into a polyethylene base material, so that the composite material has good stability in an illumination environment, namely the toughness of the composite material is changed little under long-time illumination; as described above, the toughness of the elastomer after it is incorporated into a polyethylene base material exhibits good light resistance and heat resistance;
according to the invention, the anti-migration antioxidant is introduced into the polyethylene base material, and the anti-migration antioxidant is the antioxidant 702 loaded on silicon dioxide, so that the migration and precipitation of the micromolecular antioxidant are reduced, and the aging resistance of the composite material is further improved;
in conclusion, the drain pipe provided by the invention has good toughness for polyethylene materials, and the toughness of the drain pipe shows good light resistance and heat resistance.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
the amino-terminated polydimethylsiloxane is prepared by the following steps:
under the protection of nitrogen gas flow, 50g of D4 and 0.5g of catalyst benzyltrimethyl ammonium hydroxide methanol solution (0.5 wt%) are added into a four-neck flask, the mixture is heated to 43 ℃ under magnetic stirring, 6g of end-capping reagent is added, residual water and methanol in the system are removed under reduced pressure, when the viscosity of the system is not changed, the equilibrium reaction is continued for 10h, the temperature is continuously increased to 172 ℃ to destroy the activity of a catalytic center, then the temperature is reduced to 150 ℃, the residual D4 monomer and low-boiling-point substance micromolecules in the reaction are removed under negative pressure to obtain amino-terminated polydimethylsiloxane, and the ring-opening polymerization reaction of D4 is utilized, wherein the end-capping reagent is 1, 3-bis (3-aminopropyl) -1,1,3, 3-tetramethyl disiloxane.
Example 2:
the elastomer is prepared by the following steps:
step S1, adding 0.1mol of cyanuric chloride and 150mL of acetone into a four-neck flask with a stirrer, a condenser tube, a thermometer and a dropping funnel, continuing to stir for 15min in an ice bath, slowly dropping 50mL of acetone solution containing 0.11mol of pentamethylpiperidinol by using the dropping funnel at 0 ℃, wherein the dropping speed is 1 drop/second, continuing to stir for 2h after complete dropping, adjusting the pH value of the system by using 10% sodium hydroxide solution in the reaction process, keeping the pH value of the system at 6, finally obtaining reaction solution, cooling the reaction solution to room temperature, performing reduced pressure suction filtration, washing for 2 times by using acetone, and drying in a vacuum drying oven to constant weight to obtain an intermediate product 1;
step S2, placing 0.1mol of intermediate product 1, 0.1mol of amino-terminated polydimethylsiloxane prepared in example 1 and 250mL of xylene into a reaction kettle, sealing, replacing air in the kettle with nitrogen for 2 times, charging nitrogen to 0.6MPa, heating to 78 ℃, stirring for reaction for 3 hours, cooling, opening the reaction kettle, adding 10mL of sodium hydroxide solution with the mass fraction of 20%, sealing again, replacing air in the kettle with nitrogen for 2 times, charging nitrogen to 0.6MPa, heating to 135 ℃, reacting for 3 hours, cooling, opening the reaction kettle, adding 0.1mol of hexamethylene diamine end-capping agent and 10mL of sodium hydroxide solution with the mass fraction of 20%, sealing again, replacing air in the kettle with nitrogen for 2-3 times, charging nitrogen to 0.6MPa, heating to 135 ℃, reacting for 1 hour, cooling, opening the reaction kettle, adding xylene for dilution, separating, washing an organic phase for 2 times with 10% of sodium chloride solution, taking the organic phase, distilling under reduced pressure, then, a dialysis bag is used for intercepting molecules with the molecular weight of 2500, and the dialysis is carried out for 2 times to obtain an amino-terminated organic silicon polymer, wherein the relative molecular mass of the amino-terminated polydimethylsiloxane is 1000;
step S3, adding 0.1mol of amino-terminated organosilicon polymer and 100mL of anhydrous dichloromethane into a four-neck flask with a stirrer, a condenser tube, a thermometer and a dropping funnel, adding 0.1mol of triethylamine under the nitrogen atmosphere at 0 ℃, stirring and mixing for 1h, adding 4-dimethylaminopyridine with the mass of 1% of the mass of the amino-terminated organosilicon polymer, dropwise adding 30mL of anhydrous dichloromethane solution containing 0.1mol of 2-furoyl chloride into the dropping funnel, continuously stirring and reacting for 3h, heating to 20 ℃, continuously stirring and reacting for 48h, filtering, continuously washing the filtrate with saturated sodium bicarbonate aqueous solution and deionized water, drying an organic layer with anhydrous magnesium sulfate, and rotationally evaporating to remove the solvent to obtain the furan-terminated organosilicon polymer;
step S4, adding 0.15mol of maleic anhydride solid into 150mL of glacial acetic acid solution containing 0.1mol of amino polysiloxane, fully stirring for 2h at room temperature to completely dissolve the maleic anhydride, then stirring for 6h at 138 ℃, cooling to room temperature, performing rotary evaporation to remove acetic acid, re-dissolving the crude product into dichloromethane, continuously washing for 2 times by using saturated sodium chloride solution, drying by using anhydrous magnesium sulfate, filtering, and performing rotary evaporation to remove dichloromethane to obtain an intermediate product 2, wherein the amino polysiloxane is purchased from Shanghai Michell chemical technology Limited company and is (6-7% of aminopropyl methyl siloxane) -dimethyl siloxane copolymer;
and step S5, uniformly mixing 50g of furan-terminated organosilicon polymer, 25g of intermediate product 2 and 500mL of dichloromethane, stirring and reacting at 83 ℃ for 12h, and cooling to room temperature to obtain the elastomer.
Example 3:
the elastomer is prepared by the following steps:
step S1, adding 0.1mol of cyanuric chloride and 150mL of acetone into a four-neck flask with a stirrer, a condenser tube, a thermometer and a dropping funnel, continuing to stir for 15min in an ice bath, slowly dropwise adding 50mL of acetone solution containing 0.12mol of pentamethylpiperidinol by using the dropping funnel at the temperature of 3 ℃, wherein the dropwise adding speed is 2 drops/second, continuing to stir for 3h after the dropwise adding is completed, adjusting the pH value of the system by using 10% sodium hydroxide solution in the reaction process, keeping the pH value of the system at 6.5, finally obtaining reaction solution, cooling the reaction solution to room temperature, performing vacuum filtration, washing for 3 times by using acetone, and drying in a vacuum drying oven to constant weight to obtain an intermediate product 1;
step S2, placing 0.1mol of intermediate product 1, 0.1mol of amino-terminated polydimethylsiloxane prepared in example 1 and 300mL of xylene into a reaction kettle, sealing, replacing air in the kettle with nitrogen for 3 times, filling nitrogen to 0.6MPa, heating to 78 ℃, stirring for reaction for 3 hours, cooling, opening the reaction kettle, adding 15mL of sodium hydroxide solution with the mass fraction of 20%, sealing again, replacing air in the kettle with nitrogen for 3 times, filling nitrogen to 0.6MPa, heating to 135 ℃, reacting for 3 hours, cooling, opening the reaction kettle, adding 0.1mol of hexamethylene diamine end-capping agent and 15mL of sodium hydroxide solution with the mass fraction of 20%, sealing again, replacing air in the kettle with nitrogen for 2-3 times, filling nitrogen to 0.6MPa, heating to 135 ℃, reacting for 1 hour, cooling, opening the reaction kettle, adding xylene for dilution, separating, washing an organic phase for 3 times by using 10% of sodium chloride solution, taking organic phase for pressure distillation, then, a dialysis bag is used for intercepting molecules with the molecular weight of 2800, and the dialysis is carried out for 2 times to obtain an amino-terminated organic silicon polymer, wherein the relative molecular mass of the amino-terminated polydimethylsiloxane is 1300;
step S3, adding 0.1mol of amino-terminated organosilicon polymer and 100mL of anhydrous dichloromethane into a four-neck flask with a stirrer, a condenser tube, a thermometer and a dropping funnel, adding 0.12mol of triethylamine under the nitrogen atmosphere at 0 ℃, stirring and mixing for 1h, adding 4-dimethylaminopyridine with the mass of 2% of the mass of the amino-terminated organosilicon polymer, dropwise adding 30mL of anhydrous dichloromethane solution containing 0.1mol of 2-furoyl chloride into the dropping funnel, continuously stirring and reacting for 3h, heating to 23 ℃, continuously stirring and reacting for 48h, filtering, continuously washing the filtrate with saturated sodium bicarbonate aqueous solution and deionized water, drying an organic layer with anhydrous magnesium sulfate, and rotationally evaporating to remove the solvent to obtain the furan-terminated organosilicon polymer;
step S4, adding 0.17mol of maleic anhydride solid into 200mL of glacial acetic acid solution containing 0.1mol of amino polysiloxane, fully stirring for 2h at room temperature to completely dissolve the maleic anhydride, then stirring for 6h at 138 ℃, cooling to room temperature, performing rotary evaporation to remove acetic acid, re-dissolving the crude product into dichloromethane, continuously washing for 3 times by using saturated sodium chloride solution, drying by using anhydrous magnesium sulfate, filtering, and performing rotary evaporation to remove dichloromethane to obtain an intermediate product 2, wherein the amino polysiloxane is purchased from Shanghai Michell chemical technology Limited company and is (6-7% of aminopropyl methyl siloxane) -dimethyl siloxane copolymer;
and step S5, uniformly mixing 65g of furan-terminated organosilicon polymer, 30g of intermediate product 2 and 550mL of dichloromethane, stirring and reacting at 83 ℃ for 12h, and cooling to room temperature to obtain the elastomer.
Example 4:
the elastomer is prepared by the following steps:
step S1, adding 0.1mol of cyanuric chloride and 150mL of acetone into a four-neck flask with a stirrer, a condenser tube, a thermometer and a dropping funnel, continuing to stir for 15min in an ice bath, slowly dropwise adding 50mL of acetone solution containing 0.13mol of pentamethylpiperidinol by using the dropping funnel at the temperature of 5 ℃, wherein the dropwise adding speed is 2 drops/second, continuing to stir for 3h after the dropwise adding is completed, adjusting the pH value of the system by using 10% sodium hydroxide solution in the reaction process, keeping the pH value of the system to be 7, finally obtaining reaction solution, cooling the reaction solution to room temperature, performing reduced pressure suction filtration, washing for 3 times by using acetone, and drying in a vacuum drying oven to constant weight to obtain an intermediate product 1;
step S2, placing 0.1mol of intermediate product 1, 0.1mol of amino-terminated polydimethylsiloxane prepared in example 1 and 400mL of xylene into a reaction kettle, sealing, replacing air in the kettle with nitrogen for 3 times, filling nitrogen to 0.6MPa, heating to 78 ℃, stirring for reaction for 3 hours, cooling, opening the reaction kettle, adding 20mL of 20 mass percent sodium hydroxide solution, sealing again, replacing air in the kettle with nitrogen for 3 times, filling nitrogen to 0.6MPa, heating to 135 ℃, reacting for 3 hours, cooling, opening the reaction kettle, adding 0.1mol of hexamethylene diamine blocking agent and 20mL of 20 mass percent sodium hydroxide solution, sealing again, replacing sodium hydroxide solution in the kettle with nitrogen for 3 times, filling nitrogen to 0.6MPa, heating to 135 ℃, reacting for 1 hour, cooling, opening the reaction kettle, adding xylene for dilution, separating, washing an organic phase for 3 times with 10 percent chlorinated solution, taking organic phase for vacuum evaporation, then, a dialysis bag is used for intercepting molecules with the relative molecular mass of 3000, and dialysis is carried out for 3 times to obtain an amino-terminated organic silicon polymer, wherein the relative molecular mass of amino-terminated polydimethylsiloxane is 1500;
step S3, adding 0.1mol of amino-terminated organosilicon polymer and 100mL of anhydrous dichloromethane into a four-neck flask with a stirrer, a condenser tube, a thermometer and a dropping funnel, adding 0.13mol of triethylamine under the nitrogen atmosphere at 0 ℃, stirring and mixing for 1h, adding 4-dimethylaminopyridine with the mass of 3% of the mass of the amino-terminated organosilicon polymer, dropwise adding 30mL of anhydrous dichloromethane solution containing 0.1mol of 2-furoyl chloride into the dropping funnel, continuously stirring and reacting for 3h, heating to 25 ℃, continuously stirring and reacting for 48h, filtering, continuously washing the filtrate with saturated sodium bicarbonate aqueous solution and deionized water, drying an organic layer with anhydrous magnesium sulfate, and rotationally evaporating to remove the solvent to obtain the furan-terminated organosilicon polymer;
step S4, adding 0.2mol of maleic anhydride solid into 300mL of glacial acetic acid solution containing 0.1mol of amino polysiloxane, fully stirring for 2h at room temperature to completely dissolve maleic anhydride, then stirring for 6h at 138 ℃, cooling to room temperature, performing rotary evaporation to remove acetic acid, re-dissolving the crude product into dichloromethane, continuously washing for 3 times by using saturated sodium chloride solution, drying by using anhydrous magnesium sulfate, filtering, and performing rotary evaporation to remove dichloromethane to obtain an intermediate product 2, wherein the amino polysiloxane is purchased from Shanghai Michell chemical technology Limited company and is (6-7% of aminopropyl methyl siloxane) -dimethyl siloxane copolymer;
and step S5, uniformly mixing 80g of furan-terminated organosilicon polymer, 35g of intermediate product 2 and 500mL of dichloromethane, stirring and reacting at 83 ℃ for 12h, and cooling to room temperature to obtain the elastomer.
Example 5:
the migration resistant antioxidant is prepared by the following steps: putting 20g of silicon dioxide into an Erlenmeyer flask, then adding 1g of antioxidant 702, then adding 50mL of ethanol solution containing 0.01g of dibutyltin dilaurate catalyst, and stirring and reacting for 4h at 65 ℃ to obtain a migration-resistant antioxidant;
a corrosion-resistant polyethylene material for drain pipes is prepared by the following steps:
step one, stirring and mixing 60g of high-density polyethylene, 15g of low-density polyethylene and 8g of elastomer prepared in example 2 at 150 ℃ and 500r/min for 10min, then adding 2g of modified glass fiber, 1.5g of migration-resistant antioxidant and 2g of lubricant (aluminum stearate), and stirring at 160 ℃ and 800r/min for 15min to obtain a mixed material;
and step two, feeding the mixed material into a granulator for granulation, and controlling the temperature of a charging barrel of the granulator to be 170 ℃ to obtain the corrosion-resistant polyethylene material for the drain pipe.
Example 6:
the migration resistant antioxidant is prepared by the following steps: putting 20g of silicon dioxide into a triangular flask, adding 2g of antioxidant 702, adding 60mL of ethanol solution containing 0.02g of dibutyltin dilaurate catalyst, and stirring at 65 ℃ for reaction for 4h to obtain a migration-resistant antioxidant;
a corrosion-resistant polyethylene material for drain pipes is prepared by the following steps:
step one, stirring and mixing 80g of high-density polyethylene, 20g of low-density polyethylene and 12g of elastomer prepared in example 3 at 160 ℃ and 600r/min for 12min, then adding 2g of modified glass fiber, g of migration-resistant antioxidant and 3g of lubricant (magnesium stearate), and stirring at 170 ℃ and 900r/min for 20min to obtain a mixed material;
and step two, feeding the mixed material into a granulator for granulation, and controlling the temperature of a charging barrel of the granulator to be 180 ℃ to obtain the corrosion-resistant polyethylene material for the drain pipe.
Example 7:
the migration resistant antioxidant is prepared by the following steps: putting 20g of silicon dioxide into an Erlenmeyer flask, then adding 3g of antioxidant 702, then adding 60mL of ethanol solution containing 0.09 dibutyltin dilaurate catalyst, and stirring and reacting for 4h at 65 ℃ to obtain a migration-resistant antioxidant;
a corrosion-resistant polyethylene material for drain pipes is prepared by the following steps:
step one, 87g of high-density polyethylene, 27g of low-density polyethylene and 16g of the elastomer prepared in example 4 are stirred and mixed for 15min at 170 ℃ and 700r/min, then 5g of modified glass fiber, 3.5g of migration-resistant antioxidant and 4g of lubricant (magnesium stearate) are added, and stirring is carried out for 25min at 185 ℃ and 1000r/min, so as to obtain a mixed material;
and step two, feeding the mixed material into a granulator for granulation, and controlling the temperature of a charging barrel of the granulator to be 190 ℃ to obtain the corrosion-resistant polyethylene material for the drain pipe.
Comparative example 1:
the elastomer is prepared by the following steps:
step S1, adding 0.1mol of the amino-terminated polydimethylsiloxane prepared in example 1 and 100mL of anhydrous dichloromethane into a four-necked flask equipped with a stirrer, a condenser, a thermometer and a dropping funnel, adding 0.1mol of triethylamine under the atmosphere of nitrogen at 0 ℃, stirring and mixing for 1h, adding 4-dimethylamino pyridine with the mass being 1 percent of the mass of the amino-terminated organosilicon polymer, dropwise adding 30mL of anhydrous dichloromethane solution containing 0.1mol of 2-furoyl chloride by using a dropping funnel, continuously stirring and reacting for 3h, heating to 20 ℃, continuously stirring for reaction for 48 hours, filtering, continuously washing the filtrate with saturated sodium bicarbonate aqueous solution and deionized water, drying the organic layer with anhydrous magnesium sulfate, and removing the solvent by rotary evaporation to obtain a furan-terminated organic silicon polymer, wherein the relative molecular mass of the amino-terminated polydimethylsiloxane is 1000;
step S2, adding 0.15mol of maleic anhydride solid into 150mL of glacial acetic acid solution containing 0.1mol of amino polysiloxane, fully stirring for 2h at room temperature to completely dissolve maleic anhydride, then stirring for 6h at 138 ℃, cooling to room temperature, removing acetic acid by rotary evaporation, re-dissolving the crude product into dichloromethane, continuously washing for 2 times by using saturated sodium chloride solution, drying by using anhydrous magnesium sulfate, filtering, and then removing dichloromethane by rotary evaporation to obtain an intermediate product 2;
and step S3, uniformly mixing 50g of furan-terminated organosilicon polymer, 25g of intermediate product 2 and 500mL of dichloromethane, stirring and reacting at 83 ℃ for 12h, and cooling to room temperature to obtain the elastomer.
Comparative example 2:
the corrosion-resistant polyethylene material for the drain pipe comprises the following raw materials in parts by weight: 80g of high-density polyethylene, 20g of low-density polyethylene, 3g of modified glass fiber, 2g of migration-resistant antioxidant, and 3g of lubricant (aluminum stearate), the remainder being the same as in example 5.
Comparative example 3:
the corrosion-resistant polyethylene material for the drain pipe comprises the following raw materials in parts by weight: 80g of high-density polyethylene, 20g of low-density polyethylene, 12g of the elastomer prepared in comparative example 1, 3g of modified glass fiber, 3.5g of migration-resistant antioxidant, 3g of lubricant (magnesium stearate), and the rest of the procedure was the same as in example 6.
Comparative example 4:
the corrosion-resistant polyethylene material for the drain pipe comprises the following raw materials in parts by weight: 87g of high-density polyethylene, 27g of low-density polyethylene, 16g of the elastomer prepared in example 4, 5g of modified glass fiber, and 4g of a lubricant (magnesium stearate), the remainder being the same as in example 7.
Example 8:
the polyethylene materials obtained in examples 5 to 7 and comparative examples 2 to 4 were subjected to the following performance tests:
manufacturing a drain pipe, and testing the pipe performance: the ring stiffness of the pipe is measured according to GB/T9647-2015, the longitudinal shrinkage of the pipe is measured according to GB/T6671-2001, and the measurement results show that the ring stiffness of the examples 5-7 and the ring stiffness of the comparative examples 2-4 are both more than or equal to 20kN/m2(the technical requirement is more than or equal to 10kN/m2) The longitudinal retraction rate is about 2 percent and is less than 3 percent of the technical requirement, and the pipe samples have no delamination and no cracking, and the inner surface and the outer surface of the pipe are smooth and flat without defects of bubbles, pits and the like;
tensile strength: preparing samples according to the standard GB/T8804.2 and testing;
elongation at break: preparing a sample according to a standard GB/T5836 and testing;
and (3) testing thermal aging resistance: referring to the standard GB/T3512-2001 of rubber hot air accelerated aging and heat resistance experiments, a sample to be tested is cut into a dumbbell-shaped sample strip, the aging box is adjusted to 120 ℃, then the test sample strip is placed in the aging box for experiment, the sample is taken out after 72 hours, the aged sample strip is placed in the air for environment adjustment for 48 hours, an electronic universal tester (Zwick, Germany) is used for testing the tensile strength of the sample strip before and after aging, and the change rate of the mechanical property is observed, wherein the formula is as follows:
p: rate of change of mechanical properties,%;
xa: the measured value of the tensile strength of the test sample after aging;
x0: the tensile strength measurement of the test before sample aging;
and (3) testing the light aging resistance: according to the method in ISO 877, a sample to be tested is made into a sample, the exposure illumination time is 560h, the tensile strength Ya after illumination is tested, the mechanical property change rate D is calculated, and the calculation formula refers to the aging mechanical property change rate.
The results of the above tests are shown in the following table.
As can be seen from the data of elongation at break and tensile strength, the corresponding properties of the polyethylene materials obtained in examples 5-7 are better than those of the polyethylene materials obtained in comparative examples 2-4, which shows that the corrosion-resistant polyethylene material for drain pipes provided by the invention has good toughness, and as can be seen from the two sets of data of thermal aging resistance and light aging resistance, the corresponding properties of the polyethylene materials obtained in examples 5-7 are better than those of the polyethylene materials obtained in comparative examples 2-4, which shows that the toughness of the corrosion-resistant polyethylene material for drain pipes provided by the invention has good light resistance and heat resistance.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.
Claims (8)
1. A corrosion-resistant polyethylene material for drain pipes is characterized in that: the method comprises the following raw materials: high density polyethylene, low density polyethylene, elastomers, modified glass fibers, migration resistant antioxidants, lubricants;
the elastomer is prepared by the following steps:
step A, uniformly mixing maleic anhydride, amino polysiloxane and glacial acetic acid, stirring for 6h at 138 ℃, cooling to room temperature, performing rotary evaporation to obtain a crude product, dissolving again with dichloromethane, washing, drying, filtering, and performing rotary evaporation to obtain an intermediate product 2;
and step B, uniformly mixing the furan-terminated organosilicon polymer, the intermediate product 2 and dichloromethane, stirring and reacting at 83 ℃ for 12 hours, and cooling to room temperature to obtain the elastomer.
2. The corrosion-resistant polyethylene material for drain pipes according to claim 1, wherein: the polyethylene material comprises the following raw materials in parts by weight: 63-87 parts of high-density polyethylene, 15-27 parts of low-density polyethylene, 8-16 parts of elastomer, 2-5 parts of modified glass fiber, 1.5-3.5 parts of migration-resistant antioxidant and 2-4 parts of lubricant.
3. The corrosion-resistant polyethylene material for drain pipes according to claim 1, wherein: the furan-terminated silicone polymer is made by the following method:
uniformly mixing the amino-terminated organic silicon polymer and anhydrous dichloromethane, adding triethylamine, mixing for 1h at 0 ℃ under the nitrogen atmosphere, adding 4-dimethylaminopyridine, dropwise adding an anhydrous dichloromethane solution of 2-furoyl chloride, continuously reacting for 3h after complete dropwise addition, heating to 20-25 ℃, continuously reacting for 48h, filtering, washing, drying, and performing rotary evaporation to obtain the furan-terminated organic silicon polymer.
4. The corrosion-resistant polyethylene material for drain pipes according to claim 3, wherein: the mol ratio of the amino-terminated organosilicon polymer to the triethylamine to the 2-furoyl chloride is 1: 1-1.3: the adding mass of the 1, 4-dimethylamino pyridine is 1-3% of the mass of the amino-terminated organosilicon polymer.
5. The corrosion-resistant polyethylene material for drain pipes according to claim 3, wherein: the amino-terminated silicone polymer is made by the steps of:
step A1, stirring cyanuric chloride and acetone in an ice bath for 15min, then dropwise adding an acetone solution containing pentamethylpiperidinol at 0-5 ℃, continuously stirring for 2-3h after completely dropwise adding, keeping the pH value of the system between 6-7 in the reaction process to finally obtain a reaction solution, cooling the reaction solution to room temperature, carrying out reduced pressure suction filtration, washing and drying to obtain an intermediate product 1;
step A2, placing the intermediate product 1, amino-terminated polydimethylsiloxane and xylene into a reaction kettle, sealing, stirring and reacting for 3 hours at 78 ℃ under 0.6MPa in a nitrogen atmosphere, cooling, opening the reaction kettle, adding a sodium hydroxide solution, sealing again, reacting for 3 hours at 135 ℃ under 0.6MPa in a nitrogen atmosphere, cooling, opening the reaction kettle, adding hexamethylenediamine and a sodium hydroxide solution, sealing again, reacting for 1 hour at 135 ℃ under 0.6MPa in a nitrogen atmosphere, and performing post-treatment to obtain the amino-terminated organosilicon polymer.
6. The corrosion-resistant polyethylene material for drain pipes according to claim 5, wherein: in the step A1, the molar ratio of cyanuric chloride to pentamethylpiperidinol is 1: 1.1-1.3.
7. The corrosion-resistant polyethylene material for drain pipes according to claim 5, wherein: the ratio of the amount of the intermediate product 1, the amount of the amino-terminated polydimethylsiloxane, the total amount of the sodium hydroxide solutions, the amount of the ethylenediamine and the amount of the xylene in the step A2 is 0.1 mol: 0.1 mol: 20-40 mL: 0.1 mol: 250-400 mL.
8. The method for preparing a corrosion-resistant polyethylene material for drain pipes according to claim 1, wherein the method comprises the following steps: the method comprises the following steps:
stirring high-density polyethylene, low-density polyethylene and elastomer at the temperature of 150-170 ℃ for 10-15min, adding modified glass fiber, a migration-resistant antioxidant and a lubricant, stirring at the temperature of 160-185 ℃ for 15-25min to obtain a mixed material, and then mixing and granulating to obtain the corrosion-resistant polyethylene material for the drain pipe.
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