CN116731487A - Nitrogen-phosphorus high-flame-retardance high-strength PET (polyethylene terephthalate) composite material and preparation method thereof - Google Patents
Nitrogen-phosphorus high-flame-retardance high-strength PET (polyethylene terephthalate) composite material and preparation method thereof Download PDFInfo
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- 239000002131 composite material Substances 0.000 title claims abstract description 53
- YUWBVKYVJWNVLE-UHFFFAOYSA-N [N].[P] Chemical compound [N].[P] YUWBVKYVJWNVLE-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 229920000139 polyethylene terephthalate Polymers 0.000 title claims description 80
- -1 polyethylene terephthalate Polymers 0.000 title claims description 8
- 238000002360 preparation method Methods 0.000 title abstract description 22
- 239000005020 polyethylene terephthalate Substances 0.000 title description 66
- 239000003063 flame retardant Substances 0.000 claims abstract description 88
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 69
- 239000008187 granular material Substances 0.000 claims abstract description 37
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 33
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 32
- 150000001875 compounds Chemical class 0.000 claims abstract description 27
- 239000000779 smoke Substances 0.000 claims abstract description 23
- 239000012745 toughening agent Substances 0.000 claims abstract description 21
- 239000002657 fibrous material Substances 0.000 claims abstract description 19
- 229920000728 polyester Polymers 0.000 claims abstract description 12
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Chemical compound O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 claims description 28
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Chemical compound O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 claims description 26
- 229920006124 polyolefin elastomer Polymers 0.000 claims description 26
- 239000000395 magnesium oxide Substances 0.000 claims description 16
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 16
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 16
- 229920001707 polybutylene terephthalate Polymers 0.000 claims description 15
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 14
- 239000004917 carbon fiber Substances 0.000 claims description 14
- KTWOOEGAPBSYNW-UHFFFAOYSA-N ferrocene Chemical compound [Fe+2].C=1C=C[CH-]C=1.C=1C=C[CH-]C=1 KTWOOEGAPBSYNW-UHFFFAOYSA-N 0.000 claims description 14
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 229920001971 elastomer Polymers 0.000 claims description 6
- 239000000806 elastomer Substances 0.000 claims description 6
- 229920002239 polyacrylonitrile Polymers 0.000 claims description 6
- 229920001169 thermoplastic Polymers 0.000 claims description 6
- 239000004416 thermosoftening plastic Substances 0.000 claims description 6
- 239000011787 zinc oxide Substances 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 5
- 239000003365 glass fiber Substances 0.000 claims description 5
- PGTXKIZLOWULDJ-UHFFFAOYSA-N [Mg].[Zn] Chemical class [Mg].[Zn] PGTXKIZLOWULDJ-UHFFFAOYSA-N 0.000 claims description 4
- QYMGIIIPAFAFRX-UHFFFAOYSA-N butyl prop-2-enoate;ethene Chemical compound C=C.CCCCOC(=O)C=C QYMGIIIPAFAFRX-UHFFFAOYSA-N 0.000 claims description 4
- 229920006245 ethylene-butyl acrylate Polymers 0.000 claims description 4
- 150000002506 iron compounds Chemical class 0.000 claims description 4
- 229910044991 metal oxide Inorganic materials 0.000 claims description 4
- 150000004706 metal oxides Chemical class 0.000 claims description 4
- 239000005078 molybdenum compound Substances 0.000 claims description 4
- 150000002752 molybdenum compounds Chemical class 0.000 claims description 4
- VOZRXNHHFUQHIL-UHFFFAOYSA-N glycidyl methacrylate Chemical compound CC(=C)C(=O)OCC1CO1 VOZRXNHHFUQHIL-UHFFFAOYSA-N 0.000 claims description 3
- 229920001112 grafted polyolefin Polymers 0.000 claims description 3
- 239000004615 ingredient Substances 0.000 claims description 3
- 230000001590 oxidative effect Effects 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 3
- 150000003752 zinc compounds Chemical class 0.000 claims description 3
- WBWXVCMXGYSMQA-UHFFFAOYSA-N 3,9-bis[2,4-bis(2-phenylpropan-2-yl)phenoxy]-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane Chemical compound C=1C=C(OP2OCC3(CO2)COP(OC=2C(=CC(=CC=2)C(C)(C)C=2C=CC=CC=2)C(C)(C)C=2C=CC=CC=2)OC3)C(C(C)(C)C=2C=CC=CC=2)=CC=1C(C)(C)C1=CC=CC=C1 WBWXVCMXGYSMQA-UHFFFAOYSA-N 0.000 claims description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 claims description 2
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 2
- 239000010425 asbestos Substances 0.000 claims description 2
- 229920001577 copolymer Polymers 0.000 claims description 2
- 238000005469 granulation Methods 0.000 claims description 2
- 230000003179 granulation Effects 0.000 claims description 2
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 2
- 239000000347 magnesium hydroxide Substances 0.000 claims description 2
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 2
- 230000004048 modification Effects 0.000 claims description 2
- 238000012986 modification Methods 0.000 claims description 2
- 229910000480 nickel oxide Inorganic materials 0.000 claims description 2
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 claims description 2
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 2
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 claims description 2
- 229920001230 polyarylate Polymers 0.000 claims description 2
- 229910052895 riebeckite Inorganic materials 0.000 claims description 2
- 229910001928 zirconium oxide Inorganic materials 0.000 claims description 2
- 239000000243 solution Substances 0.000 claims 2
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 claims 1
- NFHFRUOZVGFOOS-UHFFFAOYSA-N palladium;triphenylphosphane Chemical compound [Pd].C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 NFHFRUOZVGFOOS-UHFFFAOYSA-N 0.000 claims 1
- 239000002861 polymer material Substances 0.000 abstract description 2
- 239000012752 auxiliary agent Substances 0.000 abstract 1
- 238000009775 high-speed stirring Methods 0.000 abstract 1
- 239000002994 raw material Substances 0.000 abstract 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 18
- BIKXLKXABVUSMH-UHFFFAOYSA-N trizinc;diborate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]B([O-])[O-].[O-]B([O-])[O-] BIKXLKXABVUSMH-UHFFFAOYSA-N 0.000 description 13
- 150000008301 phosphite esters Chemical class 0.000 description 12
- 238000012360 testing method Methods 0.000 description 10
- 229910052757 nitrogen Inorganic materials 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 7
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 7
- 239000001301 oxygen Substances 0.000 description 7
- 229910052698 phosphorus Inorganic materials 0.000 description 7
- 239000011574 phosphorus Substances 0.000 description 7
- 238000002485 combustion reaction Methods 0.000 description 6
- NAQMVNRVTILPCV-UHFFFAOYSA-N hexane-1,6-diamine Chemical compound NCCCCCCN NAQMVNRVTILPCV-UHFFFAOYSA-N 0.000 description 6
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000009472 formulation Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- XZAXQWXHBDKYJI-UHFFFAOYSA-N 2-[(6-oxobenzo[c][2,1]benzoxaphosphinin-6-yl)methyl]butanedioic acid Chemical compound C1=CC=C2P(CC(CC(=O)O)C(O)=O)(=O)OC3=CC=CC=C3C2=C1 XZAXQWXHBDKYJI-UHFFFAOYSA-N 0.000 description 2
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- YHWCPXVTRSHPNY-UHFFFAOYSA-N butan-1-olate;titanium(4+) Chemical compound [Ti+4].CCCC[O-].CCCC[O-].CCCC[O-].CCCC[O-] YHWCPXVTRSHPNY-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005886 esterification reaction Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000002329 infrared spectrum Methods 0.000 description 2
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 2
- FGHOOJSIEHYJFQ-UHFFFAOYSA-N (2,4-ditert-butylphenyl) dihydrogen phosphite Chemical compound CC(C)(C)C1=CC=C(OP(O)O)C(C(C)(C)C)=C1 FGHOOJSIEHYJFQ-UHFFFAOYSA-N 0.000 description 1
- LLLVZDVNHNWSDS-UHFFFAOYSA-N 4-methylidene-3,5-dioxabicyclo[5.2.2]undeca-1(9),7,10-triene-2,6-dione Chemical compound C1(C2=CC=C(C(=O)OC(=C)O1)C=C2)=O LLLVZDVNHNWSDS-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 125000004185 ester group Chemical group 0.000 description 1
- 230000032050 esterification Effects 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000013022 formulation composition Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 238000009863 impact test Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- DXZMANYCMVCPIM-UHFFFAOYSA-L zinc;diethylphosphinate Chemical compound [Zn+2].CCP([O-])(=O)CC.CCP([O-])(=O)CC DXZMANYCMVCPIM-UHFFFAOYSA-L 0.000 description 1
- BNEMLSQAJOPTGK-UHFFFAOYSA-N zinc;dioxido(oxo)tin Chemical compound [Zn+2].[O-][Sn]([O-])=O BNEMLSQAJOPTGK-UHFFFAOYSA-N 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
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- 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
- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/44—Polyester-amides
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention belongs to the technical field of high polymer materials, and particularly discloses a nitrogen-phosphorus high-flame-retardant high-strength PET composite material and a preparation method thereof, wherein the high-flame-retardant high-strength PET composite material comprises the following formula components: 100 parts of PET granules, 5-25 parts of polyester, 1-5 parts of toughening agent, 0.1-0.5 part of antioxidant, 2-15 parts of smoke suppressant, 5-25 parts of compound flame retardant and 5-30 parts of fiber material. The preparation method comprises the following steps: PET granules are used as a main raw material, and polyester, a toughening agent, an antioxidant, a smoke suppressant, a compound flame retardant and a fiber material are added as functional auxiliary agents; is mixed by high-speed stirring of an internal mixer. The high-flame-retardance high-strength PET composite material has the remarkable advantages of high strength, excellent flame retardance and the like, and has a good application prospect.
Description
Technical Field
The invention belongs to the technical field of high polymer materials, and particularly discloses a nitrogen-phosphorus high-flame-retardant high-strength PET composite material and a preparation method thereof.
Background
Ethylene Terephthalate (PET) has a wide range of applications, has excellent mechanical properties under static and dynamic loads, and is generally used for manufacturing daily necessities such as fibers, films, plastic containers, and the like. PET has excellent comprehensive performance, but has a relatively low limiting oxygen index, and because of weak surface charring effect during combustion, can not effectively isolate oxygen and heat transfer, a large amount of molten drops with flame and harmful smog can be generated during combustion. The molten drop can cause secondary disasters, and the smoke is harmful to human bodies, and brings visual barriers to fire fighting and escape. Its flammability severely limits its field of application. Therefore, research into flame retardance of polyester fibers has attracted worldwide attention.
Patent CN108164935A and CN104672817a refer to the preparation methods of high glow wire high strength reinforced flame retardant PET materials, both relate to brominated flame retardants, but brominated flame retardants generate toxic and corrosive gases and a large amount of smoke in the combustion process, and are disabled successively in recent years, so that development of a halogen-free flame retardant PET composite material is necessary.
Disclosure of Invention
Aiming at the defects or shortcomings of the prior art, the invention aims to provide a high-flame-retardant high-strength PET composite material and a preparation method thereof.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention provides a high-flame-retardant high-strength PET composite material, which comprises the following formula components: 100 parts of PET granules, 5-25 parts of thermoplastic polyester, 1-5 parts of toughening agent, 0.1-0.5 part of antioxidant, 2-15 parts of smoke suppressant, 5-25 parts of compound flame retardant and 5-30 parts of fiber material.
Wherein the thermoplastic polyester is one or more of polybutylene terephthalate, polyarylate and polyester elastomer (TPEE).
The toughening agent is one or more of polyolefin elastomer (POE) or Glycidyl Methacrylate (GMA) grafted polyolefin elastomer (POE-g-GMA), ethylene-glycidyl methacrylate copolymer (E-GMA) and Ethylene Butyl Acrylate (EBA).
The antioxidant is one or more of pentaerythritol tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] phosphite, tri [2, 4-di-tert-butylphenyl ] phosphite or bis (2, 4-dicumylphenyl) pentaerythritol diphosphite.
The smoke suppressant is one or more of molybdenum compound, iron compound, metal oxide or zinc-magnesium compound.
Wherein the molybdenum compound is molybdenum trioxide or ammonium octamolybdate; the iron compound is ferrocene.
The metal oxide is one or more of magnesium oxide, zinc oxide, nickel oxide or zirconium oxide; the zinc-magnesium complex is a complex of magnesium oxide and zinc oxide.
The compound flame retardant consists of a nitrogen-phosphorus macromolecular flame retardant and an antimonous oxide, magnesium hydroxide, aluminum hydroxide or zinc compound.
Wherein the zinc compound is one or more of zinc borate, zinc aluminate or zinc stannate.
The fiber material is one or more of asbestos, glass fiber or carbon fiber.
The preparation method of the high-flame-retardance high-strength PET composite material comprises the following steps:
(1) Fully drying the PET granules to ensure that the moisture content is less than 100ppm;
(2) Fully drying the compound flame retardant to ensure that the moisture content is less than 100ppm;
(3) Pretreatment of fiber materials: firstly preparing a polyacrylonitrile solution, then soaking a fiber material in the polyacrylonitrile solution, pre-oxidizing the soaked fiber material in a baking oven at 50-300 ℃ for 0.1-100 hours, and drying to obtain a fiber material subjected to surface modification pretreatment for later use;
(4) And fully mixing PET granules, thermoplastic polyester, a toughening agent, an antioxidant, a smoke suppressant, a compound flame retardant and a fiber material, wherein the compound flame retardant is added by a fifth section side feed of a double-screw extruder or is added from a main feed after being weighed by a weightlessness scale, preferably is added from a side feed, the PET granules and other ingredients are added by a main feed port after being weighed by the weightlessness scale, and then are blended, extruded and granulated by the double-screw extruder according to a set extrusion process, so that the required PET composite material is obtained.
The process of blending, extruding and granulating by an extruder specifically comprises the following steps: the temperature of the first region is 180+/-5 ℃, the temperature of the second region is 260+/-5 ℃, the temperature of the third region is 280+/-5 ℃, the temperature of the fourth region is 280+/-5 ℃, the temperature of the fifth region is 280+/-5 ℃, the temperature of the sixth region is 280+/-5 ℃, the temperature of the seventh region is 280+/-5 ℃, the temperature of the eighth region is 260+/-5 ℃, the temperature of the ninth region is 250+/-5 ℃, the temperature of the die head is 270+/-5 ℃, and the rotating speed of the screw is 360-400r/min.
Compared with the prior art, the invention has the following technical effects:
the oxygen index and the vertical burning grade of the high-flame-retardance high-strength PET are greatly higher than those of common flame-retardance PET, so that the flame retardance and the mechanical property of the PET are greatly improved. Further expands the application field of flame-retardant PET; wherein, the added compound flame retardant further improves the flame retardant property of the composite material; the added fiber material can further improve the toughness and tensile property of the composite material; the preparation method has the advantages of simple process, convenient operation, easy industrial implementation and the like.
Drawings
FIG. 1 is an infrared spectrum of a nitrogen-phosphorus macromolecular flame retardant.
FIG. 2 is a graph of the heat release rate for comparative examples 1-3 and example 2.
FIG. 3 is a graph of the total heat release profile for comparative examples 1-3 and example 2.
FIG. 4 is a graph showing the temperature rise in the differential scanning calorimeter curves of comparative examples 1 to 3 and example 2.
FIG. 5 is a graph of the temperature reduction in the differential scanning calorimeter curves of comparative examples 1-3 and example 2.
FIG. 6 is a digital photograph and SEM image of the surface of the carbon layer after high temperature combustion of example 2.
Detailed Description
The invention is further illustrated below with reference to examples.
Example 1, synthesis of reactive nitrogen-phosphorus flame retardant, the synthesis reaction equation is as follows:
into 500ml conical flask, 5.969 g hexamethylenediamine and 200 ml ethanol solution were added, the conical flask was placed in an ice bath at 0℃and stirred until the temperature of the liquid in the conical flask was reduced to 0℃and hexamethylenediamine was completely dissolved in the ethanol solution, 16.17 g [ (6-oxo-6H-dibenzo [ C, E ] [1,2] oxaphosphorin-6-yl) methyl ] butanedioic acid (DDP) was added and reacted in a water bath at 70℃for 5 hours. After the reaction, cooling to room temperature, filtering the product by a Buchner funnel, washing a filter cake by 100 ml ethanol, removing excessive hexamethylenediamine, and drying in a vacuum oven at 50 ℃ for 4 hours.
The synthesis of the nitrogen-phosphorus macromolecular flame retardant is as follows:
terephthalic acid (0.19 mol,31 g), isophthalic acid (0.19 mol,31 g), ethylene glycol (0.29 mol,18 g), neopentyl glycol (0.19 mol,20 g), reactive nitrogen phosphorus flame retardant (0.04 mol,20 g), and catalyst tetrabutyl titanate (0.0001 mol,0.035 g) were added to a three-necked flask and stirred with a mechanical stirrer until uniform. The decompression distillation device is built, a thermometer is inserted into the upper end of the rectification column, and nitrogen is filled to remove air in the three-mouth bottle. The temperature was raised to 195℃by a stepwise heating method (50℃per hour). The alcohol loss is prevented by controlling the stirring rate (120 r/min) and the rectification column, and when the distillate amount reaches a theoretical value (13.69 and g) and the temperature of the top of the column is reduced to 50-60 ℃, the calculated esterification rate exceeds 96%. After the esterification reaction is finished, the rectifying column is disassembled, and a three-way pipe is replaced. Residual moisture in the system is slowly pumped out by a water pump. Finally, slowly vacuumizing through an oil pump, and removing residual moisture in the system again. The vacuum was stopped and tetrabutyl titanate (0.00001 mol,0.0035 g) was added. The temperature is raised to 250 ℃ by a step-shaped temperature raising mode (30 ℃ per hour), the pre-polycondensation reaction is carried out for 30 minutes under a system maintaining low vacuum, the temperature is raised to 260 ℃, and the reaction is continued under high vacuum degree of 100 pa. The system reaches a certain viscosity, the pole climbing phenomenon occurs, and the reaction is finished. Charging nitrogen, discharging, placing in cold water, and granulating to obtain the final product.
FIG. 1 is an infrared spectrum of a nitrogen-phosphorus macromolecular flame retardant. As can be seen from the infrared spectrogram, 2965 and 2965 cm -1 And 2878 cm -1 Is characterized by a telescopic vibration absorption peak of methylene C-H in glycol and neopentyl glycol of 1714cm -1 At C=Ocarbonyl stretching vibration peak, 1067 cm -1 、1167 cm -1 The C-O-C telescopic vibration absorption peak is shown. 1714cm -1 And 1167cm -1 The characteristic absorption peak at 1440. 1440 cm may indicate the presence of an ester group in the sample -1 The stretching vibration peak of p=o newly appears. Indicating that the nitrogen-phosphorus macromolecular flame retardant is successfully prepared.
The high-flame-retardant high-strength PET composite material comprises the following components in percentage by weight: 100 parts of PET granules, 15 parts of polybutylene terephthalate (PBT) granules, 2 parts of a toughener polyolefin elastomer (POE), 168.3 parts of an antioxidant phosphite ester antioxidant, 4 parts of a smoke suppressant (molybdenum trioxide 0.5 part, ferrocene 0.5 part, magnesium oxide 1 part, zinc borate 1 part), 5 parts of a compound flame retardant and 30 parts of carbon fiber, wherein 2.5 parts of a nitrogen-phosphorus macromolecular flame retardant and 2.5 parts of antimony trioxide.
The preparation method of the high-flame-retardance high-strength PET composite material comprises the following steps:
A. fully drying PET granules to ensure that the moisture content is less than 100ppm;
B. fully drying the compound flame retardant to ensure that the moisture content is less than 100ppm;
C. pretreatment of carbon fiber: firstly preparing a polyacrylonitrile solution (the concentration is 10%), soaking carbon fibers in the polyacrylonitrile solution for 60 minutes, pre-oxidizing the soaked carbon fibers in a baking oven at 300 ℃ for 70 minutes, and drying to obtain surface-modified pretreated carbon fibers for later use;
C. and fully mixing PET granules, PBT granules, a toughening agent, an antioxidant, a smoke suppressant and a compound flame retardant with carbon fibers, wherein the compound flame retardant is added from a fifth section side feed of a double-screw extruder after being weighed by a weightlessness scale, the PET granules and other ingredients are added from a main feed after being weighed by the weightlessness scale, and the PET composite material is obtained by blending extrusion granulation through the double-screw extruder according to a set extrusion process.
The extrusion process is specifically as follows: the temperature of the first area is 175 ℃, the temperature of the second area is 255 ℃, the temperature of the third area is 275 ℃, the temperature of the fourth area is 275 ℃, the temperature of the fifth area is 275 ℃, the temperature of the sixth area is 275 ℃, the temperature of the seventh area is 275 ℃, the temperature of the eighth area is 255 ℃, the temperature of the ninth area is 245 ℃, the temperature of the die head is 265 ℃, and the rotating speed of the screw is 360r/min.
Example 2 a nitrogen phosphorus macromolecular flame retardant was prepared as in example 1.
The high-flame-retardant high-strength PET composite material comprises the following components in percentage by weight: 100 parts of PET granules, 15 parts of PBT granules, 2 parts of toughener polyolefin elastomer (POE), 168.3 parts of antioxidant phosphite ester antioxidant, 4 parts of smoke suppressant (molybdenum trioxide 0.5 part, ferrocene 0.5 part, magnesium oxide 1 part, zinc borate 1 part), 15 parts of compound flame retardant and 30 parts of carbon fiber, wherein the nitrogen and phosphorus macromolecular flame retardant is 7.5 parts, and the antimony trioxide is 7.5 parts.
The preparation method of the PET composite material with high flame retardance and high strength is the same as that of example 1.
Example 3 a nitrogen phosphorus macromolecular flame retardant was prepared as in example 1.
The high-flame-retardant high-strength PET composite material comprises the following components in percentage by weight: 100 parts of PET granules, 15 parts of PBT granules, 2 parts of toughener polyolefin elastomer (POE), 168.3 parts of antioxidant phosphite ester antioxidant, 4 parts of smoke suppressant (molybdenum trioxide 0.5 part, ferrocene 0.5 part, magnesium oxide 1 part, zinc borate 1 part), 25 parts of compound flame retardant and 30 parts of carbon fiber, wherein the nitrogen and phosphorus macromolecular flame retardant is 12.5 parts, and the antimony trioxide is 12.5 parts.
The preparation method of the PET composite material with high flame retardance and high strength is the same as that of example 1.
Example 4 a nitrogen phosphorus macromolecular flame retardant was prepared as in example 1.
The high-flame-retardant high-strength PET composite material comprises the following components in percentage by weight: 100 parts of PET granules, 15 parts of polyester elastomer (TPEE), 2 parts of toughener polyolefin elastomer (POE), 168.3 parts of antioxidant phosphite ester antioxidants, 4 parts of smoke suppressant (molybdenum trioxide 0.5 parts, ferrocene 0.5 parts, magnesium oxide 1 parts, zinc oxide 1 part and zinc borate 1 part), 15 parts of compound flame retardant and 30 parts of carbon fiber, wherein the nitrogen and phosphorus macromolecular flame retardant is 7.5 parts and the antimonous oxide is 7.5 parts.
The preparation method of the PET composite material with high flame retardance and high strength is the same as that of example 1.
Example 5a nitrogen phosphorus macromolecular flame retardant was prepared as in example 1.
The high-flame-retardant high-strength PET composite material comprises the following components in percentage by weight: 100 parts of PET granules, 15 parts of PBT granules, 2 parts of a toughening agent Glycidyl Methacrylate (GMA) grafted polyolefin elastomer (POE-g-GMA), 168.3 parts of an antioxidant phosphite ester antioxidant, 4 parts of a smoke suppressant (molybdenum trioxide 0.5 parts, ferrocene 0.5 parts, magnesium oxide 1 part, zinc oxide 1 part and zinc borate 1 part), 15 parts of a compound flame retardant and 30 parts of a fiber material, wherein the nitrogen-phosphorus macromolecular flame retardant is 7.5 parts and the antimony trioxide is 7.5 parts.
The preparation method of the PET composite material with high flame retardance and high strength is the same as that of example 1.
Example 6 a nitrogen phosphorus macromolecular flame retardant was prepared as in example 1.
The high-flame-retardant high-strength PET composite material comprises the following components in percentage by weight: 100 parts of PET granules, 15 parts of PBT granules, 2 parts of toughener polyolefin elastomer (POE), 168.3 parts of antioxidant phosphite ester antioxidant, 4 parts of smoke suppressant (molybdenum trioxide 0.5 part, ferrocene 0.5 part, magnesium oxide 1 part, zinc borate 1 part), 15 parts of compound flame retardant and 30 parts of glass fiber, wherein the nitrogen and phosphorus macromolecular flame retardant is 7.5 parts, and the antimony trioxide is 7.5 parts.
The preparation method of the PET composite material with high flame retardance and high strength is the same as that of example 1.
Example 7a nitrogen phosphorus macromolecular flame retardant was prepared as in example 1.
The high-flame-retardant high-strength PET composite material comprises the following components in percentage by weight: 100 parts of PET granules, 15 parts of PBT granules, 2 parts of toughener polyolefin elastomer (POE), 168.3 parts of antioxidant phosphite ester antioxidant, 4 parts of smoke suppressant (molybdenum trioxide 0.5 part, ferrocene 0.5 part, magnesium oxide 1 part, zinc borate 1 part), 15 parts of compound flame retardant and 10 parts of glass fiber, wherein the nitrogen and phosphorus macromolecular flame retardant is 7.5 parts, and the antimony trioxide is 7.5 parts.
The preparation method of the PET composite material with high flame retardance and high strength is the same as that of example 1.
Example 8 a nitrogen phosphorus macromolecular flame retardant was prepared as in example 1.
The high-flame-retardant high-strength PET composite material comprises the following components in percentage by weight: 100 parts of PET granules, 15 parts of PBT granules, 2 parts of toughener polyolefin elastomer (POE), 168.3 parts of antioxidant phosphite ester antioxidant, 4 parts of smoke suppressant (molybdenum trioxide 0.5 part, ferrocene 0.5 part, magnesium oxide 1 part, zinc borate 1 part), 15 parts of compound flame retardant and 20 parts of glass fiber, wherein the nitrogen and phosphorus macromolecular flame retardant is 7.5 parts, and the antimony trioxide is 7.5 parts.
The preparation method of the PET composite material with high flame retardance and high strength is the same as that of example 1.
Comparative example 1 a flame retardant high strength PET composite comprises the following formulation in weight percent: 100 parts of PET granules, 15 parts of PBT granules, 2 parts of a toughener polyolefin elastomer (POE), 168.3 parts of an antioxidant phosphite ester antioxidant, 4 parts of a smoke suppressant (molybdenum trioxide 0.5 part, ferrocene 0.5 part, magnesium oxide 1 part, zinc borate 1 part) and 30 parts of carbon fiber.
The preparation method of the flame-retardant high-strength PET composite material is the same as that of example 1.
Comparative example 2 a flame retardant high strength PET composite comprises the following formulation in weight percent: 100 parts of PET granules, 15 parts of PBT granules, 2 parts of a toughener polyolefin elastomer (POE), 168.3 parts of an antioxidant phosphite ester antioxidant, 4 parts of a smoke suppressant (molybdenum trioxide 0.5 part, ferrocene 0.5 part, magnesium oxide 1 part, zinc borate 1 part), 15 parts of antimony trioxide and 30 parts of carbon fiber.
The preparation method of the flame-retardant high-strength PET composite material is the same as that of example 1.
Comparative example 3 flame retardant high strength PET composite comprises the following formulation composition in weight percent: 100 parts of PET granules, 15 parts of PBT granules, 2 parts of a toughener polyolefin elastomer (POE), 168.3 parts of an antioxidant phosphite ester antioxidant, 4 parts of a smoke suppressant (molybdenum trioxide 0.5 part, ferrocene 0.5 part, magnesium oxide 1 part, zinc borate 1 part), 15 parts of a nitrogen-phosphorus macromolecular flame retardant and 30 parts of carbon fibers.
The preparation method of the flame-retardant high-strength PET composite material is the same as that of example 1.
Comparative example 4 a high flame retardant high strength PET composite comprises the following formulation in weight percent: 100 parts of PET granules, 15 parts of PBT granules, 2 parts of a toughener polyolefin elastomer (POE), 168.3 parts of an antioxidant phosphite ester antioxidant, 4 parts of a smoke suppressant (molybdenum trioxide 0.5 part, ferrocene 0.5 part, magnesium oxide 1 part, zinc borate 1 part) and 15 parts of a compound flame retardant. Wherein, the nitrogen and phosphorus macromolecular flame retardant is 7.5 parts and the antimonous oxide is 7.5 parts.
The preparation method of the PET composite material with high flame retardance and high strength is the same as that of example 1.
Experimental example: the test was performed using the composite materials prepared in the examples of the present invention.
Tensile property test: according to GB/T1040-2006 standard, a tensile bar with a gauge length of 20 mm, a width of 5 mm and a thickness of 2 mm was produced. The test was carried out with a tensile speed of 50 mm/min. A total of 5 trials were performed and the data obtained were calculated as an average.
Impact performance test: according to GB/T1843-2008 test, an cantilever type pendulum impact test is adopted, a spline V-shaped notch is adopted, and the pendulum energy is 2.75J. Five groups of bars were tested together and the resulting data calculated as an average.
Limiting oxygen index test (LOI): the test was performed according to GB/T2406.2-2009 national standard, the dimensions of the test bars being 130 mm long, 6.5 mm wide and 3 mm thick. Limiting oxygen index refers to spline at N 2 And O 2 The minimum oxygen volume fraction concentration required when burning in an atmosphere.
Vertical combustion test: the test bars were sized 130 long mm, 13 wide mm and 3 thick mm according to ASTM D3801 test standard national standard. The material was classified into V-0, V-1, V-2 grades (v=vertical burn) according to the behavior of the spline burn.
Table 1 comparison of properties of PET composites
。
The oxygen index and the vertical burning grade of the high-flame-retardance high-strength PET composite material are greatly higher than those of common PET, so that the flame retardance and the mechanical property of the PET are greatly improved. Further expands the application field of flame-retardant PET; the added compound flame retardant has excellent high temperature resistance and flame retardant property, and the flame retardant property of the composite material is further improved; the added fiber material can further improve the toughness and tensile property of the composite material; the added antimony trioxide can reduce the combustion temperature. The preparation method has the advantages of simple process, convenient operation, easy industrial implementation and the like.
Claims (9)
1. The nitrogen-phosphorus high-flame-retardance high-strength PET composite material is characterized by comprising the following components in parts by mass: 100 parts of PET granules, 5-25 parts of thermoplastic polyester, 1-5 parts of toughening agent, 0.1-0.5 part of antioxidant, 2-15 parts of smoke suppressant, 5-25 parts of compound flame retardant and 5-30 parts of fiber material, wherein the compound flame retardant consists of nitrogen-phosphorus macromolecular flame retardant and antimony trioxide, magnesium hydroxide, aluminum hydroxide or zinc compound.
2. The nitrogen-phosphorus high flame retardant high strength PET composite of claim 1, wherein the thermoplastic polyester is one or more of polybutylene terephthalate, polyarylate, polyester elastomer (TPEE).
3. The nitrogen-phosphorus high flame retardant high strength PET composite of claim 1, wherein the toughening agent is one or more of polyolefin elastomer (POE), glycidyl Methacrylate (GMA) grafted polyolefin elastomer (POE-g-GMA), ethylene-glycidyl methacrylate copolymer (E-GMA), or Ethylene Butyl Acrylate (EBA).
4. The nitrogen-phosphorus high-flame-retardant high-strength PET composite material according to claim 1, wherein the antioxidant is one or more of pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], tris [2, 4-di-tert-butylphenyl ] phosphite and bis (2, 4-dicumylphenyl) pentaerythritol diphosphite.
5. The nitrogen-phosphorus high flame retardant high strength PET composite of claim 1, wherein the smoke suppressant is one or more of molybdenum compounds, iron compounds, metal oxides, or zinc magnesium composites.
6. The high flame retardant, high strength PET composite of claim 5 wherein the molybdenum compound is molybdenum trioxide or ammonium octamolybdate, the iron compound is ferrocene, the metal oxide is one or more of magnesium oxide, zinc oxide, nickel oxide or zirconium oxide, and the magnesium zinc compound is a compound of magnesium oxide and zinc oxide.
7. The nitrogen-phosphorus high flame retardant high strength PET composite of claim 1, wherein the fibrous material is one or more of asbestos, glass fibers, or carbon fibers.
8. A method for preparing the nitrogen-phosphorus high-flame-retardant high-strength PET composite material according to any one of claims 1 to 7, which comprises the following steps:
(1) Fully drying the PET granules to ensure that the moisture content is less than 100ppm;
(2) Fully drying the compound flame retardant to ensure that the moisture content is less than 100ppm;
(3) Pretreatment of fiber materials: firstly preparing a polyacrylonitrile solution, then soaking a fiber material in the polyacrylonitrile solution, pre-oxidizing the soaked fiber material in a baking oven at 50-300 ℃ for 0.1-100 hours, and drying to obtain a fiber material subjected to surface modification pretreatment for later use;
(4) And fully mixing PET granules, thermoplastic polyester, a toughening agent, an antioxidant, a smoke suppressant, a compound flame retardant and a fiber material, wherein the compound flame retardant is added from a fifth section side feed position of a double-screw extruder or from a main feed after being weighed by a weightlessness scale, and the PET granules and other ingredients are added from the main feed after being weighed by the weightlessness scale, and then are subjected to blending extrusion granulation by the double-screw extruder to obtain the PET composite material.
9. The method for preparing the phosphorus-nitrogen high-flame-retardant high-strength PET composite material, which is characterized in that: the process of blending, extruding and granulating by the extruder in the step (4) comprises the following steps: the temperature of the first region is 180+/-5 ℃, the temperature of the second region is 260+/-5 ℃, the temperature of the third region is 280+/-5 ℃, the temperature of the fourth region is 280+/-5 ℃, the temperature of the fifth region is 280+/-5 ℃, the temperature of the sixth region is 280+/-5 ℃, the temperature of the seventh region is 280+/-5 ℃, the temperature of the eighth region is 260+/-5 ℃, the temperature of the ninth region is 250+/-5 ℃, the temperature of the die head is 270+/-5 ℃, and the rotating speed of the screw is 360-400r/min.
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