CN113881122B - Ultra-high molecular weight polyethylene composition capable of being injection molded and preparation method and application thereof - Google Patents
Ultra-high molecular weight polyethylene composition capable of being injection molded and preparation method and application thereof Download PDFInfo
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- CN113881122B CN113881122B CN202111117597.4A CN202111117597A CN113881122B CN 113881122 B CN113881122 B CN 113881122B CN 202111117597 A CN202111117597 A CN 202111117597A CN 113881122 B CN113881122 B CN 113881122B
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- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 title claims abstract description 46
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 title claims abstract description 46
- 239000000203 mixture Substances 0.000 title claims abstract description 28
- 238000002347 injection Methods 0.000 title claims description 15
- 239000007924 injection Substances 0.000 title claims description 15
- 238000002360 preparation method Methods 0.000 title abstract description 7
- 239000004215 Carbon black (E152) Substances 0.000 claims abstract description 24
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 24
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 24
- 239000007788 liquid Substances 0.000 claims abstract description 24
- 239000003607 modifier Substances 0.000 claims abstract description 21
- 238000001746 injection moulding Methods 0.000 claims abstract description 11
- 239000004711 α-olefin Substances 0.000 claims abstract description 8
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 7
- 239000004743 Polypropylene Substances 0.000 claims abstract description 6
- 229920001155 polypropylene Polymers 0.000 claims abstract description 6
- 229920005606 polypropylene copolymer Polymers 0.000 claims abstract description 5
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000005977 Ethylene Substances 0.000 claims abstract description 4
- 229920000089 Cyclic olefin copolymer Polymers 0.000 claims abstract description 3
- -1 polypropylene Polymers 0.000 claims description 12
- 239000011347 resin Substances 0.000 claims description 9
- 229920005989 resin Polymers 0.000 claims description 9
- 239000003963 antioxidant agent Substances 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 6
- 229920000098 polyolefin Polymers 0.000 claims description 5
- 239000002270 dispersing agent Substances 0.000 claims description 4
- 239000000314 lubricant Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 239000002202 Polyethylene glycol Substances 0.000 claims description 3
- 230000003078 antioxidant effect Effects 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 229920001223 polyethylene glycol Polymers 0.000 claims description 3
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 2
- 239000000155 melt Substances 0.000 claims description 2
- 229920000728 polyester Polymers 0.000 claims description 2
- 229920000570 polyether Polymers 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 2
- 238000005299 abrasion Methods 0.000 abstract description 9
- 208000035874 Excoriation Diseases 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 8
- 239000004698 Polyethylene Substances 0.000 description 7
- 229920000573 polyethylene Polymers 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 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 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 229920006150 hyperbranched polyester Polymers 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XYXJKPCGSGVSBO-UHFFFAOYSA-N 1,3,5-tris[(4-tert-butyl-3-hydroxy-2,6-dimethylphenyl)methyl]-1,3,5-triazinane-2,4,6-trione Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C)=C1CN1C(=O)N(CC=2C(=C(O)C(=CC=2C)C(C)(C)C)C)C(=O)N(CC=2C(=C(O)C(=CC=2C)C(C)(C)C)C)C1=O XYXJKPCGSGVSBO-UHFFFAOYSA-N 0.000 description 1
- UAUDZVJPLUQNMU-UHFFFAOYSA-N Erucasaeureamid Natural products CCCCCCCCC=CCCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-UHFFFAOYSA-N 0.000 description 1
- 229920002582 Polyethylene Glycol 600 Polymers 0.000 description 1
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- 229920010741 Ultra High Molecular Weight Polyethylene (UHMWPE) Polymers 0.000 description 1
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- UAUDZVJPLUQNMU-KTKRTIGZSA-N erucamide Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-KTKRTIGZSA-N 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000003864 humus Substances 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- FATBGEAMYMYZAF-KTKRTIGZSA-N oleamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(N)=O FATBGEAMYMYZAF-KTKRTIGZSA-N 0.000 description 1
- FATBGEAMYMYZAF-UHFFFAOYSA-N oleicacidamide-heptaglycolether Natural products CCCCCCCCC=CCCCCCCCC(N)=O FATBGEAMYMYZAF-UHFFFAOYSA-N 0.000 description 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 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920013639 polyalphaolefin Polymers 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- UKRDPEFKFJNXQM-UHFFFAOYSA-N vinylsilane Chemical compound [SiH3]C=C UKRDPEFKFJNXQM-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-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
- 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
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/068—Ultra high molecular weight polyethylene
Abstract
The invention discloses an injection-moldable ultra-high molecular weight polyethylene composition, a preparation method and application thereof. The composition comprises the following components in parts by weight: 60-90 parts of ultra-high molecular weight polyethylene; 1-25 parts of polypropylene copolymer; 0.2-3 parts of flow modifier; 0.1 to 1 part of liquid hydrocarbon synthetic oil; 0-1 part of other auxiliary agents; the liquid hydrocarbon synthetic oil is one or more of alpha-olefin oligomer or ethylene and alpha-olefin copolymer. The invention can realize injection molding by adding the co-polypropylene, the flow modifier and the liquid hydrocarbon synthetic oil, and has low friction coefficient and low abrasion, and the composition can be used for preparing mechanical parts.
Description
Technical Field
The invention relates to the technical field of engineering plastic processing, in particular to an injection-moldable ultra-high molecular weight polyethylene composition, a preparation method and application thereof.
Background
Ultra-high molecular weight polyethylene (UHMWPE) generally refers to linear structure polyethylene with a viscosity average molecular weight of 150 ten thousand and a weight average molecular weight of more than 100 ten thousand, and the molecular weight of common polyethylene is only about 2 to 30 ten thousand, and the molecular structure of common polyethylene is basically the same as that of common polyethylene, but the physical and mechanical properties of common polyethylene are far better than those of common polyethylene, such as non-toxicity, light weight, low price, low water absorption rate, and good ultra-low temperature service performance, especially the five characteristics of impact resistance, wear resistance, chemical corrosion resistance, self-lubrication and impact energy absorption are the best in all plastics at present. However, due to the high molecular weight of UHMWPE, the molecular chain length, entanglement are strong, and even though the processing temperature is higher than the melting point, fluidity is poor, limiting its wider application.
There are many existing technologies for improving the fluidity of UHMWPE, for example, chinese patent (CN 105001487 a) discloses a multi-purpose injection-grade ultra-high molecular weight polyethylene functional composite material, the method is divided into two steps, the ultra-high molecular weight polyethylene resin is compounded with a specific proportion of vinyl silane coupling agent, thermal initiator and crosslinking catalyst, and then is compounded with a low molecular weight polyolefin flow modifier, so as to obtain an injection-grade ultra-high molecular weight polyethylene composite material, and finally, according to the requirements of the product, a quantitative lubricant, an antistatic agent and a nano material are compounded to prepare the injection-grade ultra-high molecular weight polyethylene composite material, and the scheme needs to carry out coupling modification on the ultra-high molecular weight polyethylene, and adopts the low molecular weight polyolefin as the flow modifier to have limited processing improvement effect.
Disclosure of Invention
The invention provides an injection-moldable ultrahigh molecular weight polyethylene composition, which overcomes the defects that the improvement effect of taking low molecular weight polyolefin as a flow modifier is not obvious and the ultrahigh molecular weight polyethylene needs coupling modification in the prior art.
It is another object of the present invention to provide a method for preparing the injection moldable ultra high molecular weight polyethylene composition.
It is another object of the present invention to provide the use of said injection moldable ultra high molecular weight polyethylene composition.
In order to achieve the above purpose, the invention adopts the following technical scheme:
an injection-moldable ultra-high molecular weight polyethylene composition comprising the following components in parts by weight:
the liquid hydrocarbon synthetic oil is one or more of alpha-olefin oligomer or ethylene and alpha-olefin copolymer.
The liquid hydrocarbon synthetic oil is an oligomer formed by C3-20 alpha-olefin or a copolymer formed by ethylene and C3-20 alpha-olefin. Preferably, the kinematic viscosity (40 ℃ C., ASTM D445) of the liquid hydrocarbon synthetic oil is 30 to 2400mm 2 /s。
More preferably, the kinematic viscosity (40 ℃ C., ASTM D445) of the liquid hydrocarbon synthetic oil is more preferably 30 to 2000mm 2 /s。
More preferably, the kinematic viscosity (40 ℃ C., ASTM D445) of the liquid hydrocarbon synthetic oil is 60 to 1500mm 2 /s。
The invention adopts the combined action of the copolymerized polypropylene, the liquid hydrocarbon synthetic oil and the flow modifier to improve the processability of the ultra-high molecular weight polyethylene.
The mass ratio of the flow modifier to the liquid hydrocarbon synthetic oil has an important effect on improving the processability of the material based on the dual mechanism of increasing the free volume of the molecular chain and promoting the slip of the molecular chain, and therefore, preferably, the mass ratio of the liquid hydrocarbon synthetic oil to the flow modifier is 1: (0.5-2).
Preferably, the flow modifier is a polyethylene glycol and/or hyperbranched resin dispersant.
More preferably, the hyperbranched resin dispersant is one or more of polyester hyperdispersant, polyether hyperdispersant or polyolefin hyperdispersant.
Preferably, the other auxiliary agent is an antioxidant and/or a lubricant.
More preferably, the antioxidant is selected from one or more of antioxidants 1010 (pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate), antioxidants 168 (tris (2, 4-di-tert-butylphenyl) phosphite), antioxidants 1790 (1, 3, 5-tris (4-tert-butyl-3-hydroxy-2, 6-dimethylbenzyl) -1,3, 5-triazine-2, 4,6- (1 h,3h,5 h) -trione), antioxidants 412S (pentaerythritol tetra-3-laurylthiopropionate).
More preferably, the lubricant is selected from one or more of erucamide, oleamide, EBS amide, PE wax and stearate.
Preferably, the weight average molecular weight of the ultra-high molecular weight polyethylene is between 100 and 500 tens of thousands.
Preferably, the melt flow rate of the polypropylene copolymer is 1-100 g/10min at 230 ℃/2.16 kg.
The preparation method of the injection-moldable ultrahigh molecular weight polyethylene composition comprises the following steps:
s1, uniformly mixing ultra-high molecular weight polyethylene, polypropylene copolymer, a flow modifier, liquid hydrocarbon synthetic oil and other auxiliary agents to obtain a premix;
s2, extruding and granulating the premix in the step S1 to obtain the ultra-high molecular weight polyethylene composition capable of being injection molded.
Preferably, the processing temperature of the extrusion is 200-240 ℃.
The injection-moldable ultra-high molecular weight polyethylene composition is applied to the preparation of mechanical part products.
Compared with the prior art, the invention has the beneficial effects that:
the invention adopts the combined action of the copolymerized polypropylene, the liquid hydrocarbon synthetic oil and the flow modifier to improve the compatibility and the dispersibility of the ultra-high molecular weight polyethylene. The ultra-high molecular weight polyethylene resin can be injection molded, has lower friction coefficient and abrasion, and expands the application range of the ultra-high molecular weight polyethylene resin.
Detailed Description
Technical solutions in the embodiments of the present invention will be clearly and completely described below, but the embodiments of the present invention are not limited thereto.
The reagents, methods and apparatus employed in the present invention, unless otherwise specified, are all conventional in the art.
The following examples and comparative examples were prepared from the following raw materials:
ultra-high molecular weight polyethylene a:340M, weight average molecular weight 350 ten thousand, triple well chemistry;
ultra-high molecular weight polyethylene B:240S, weight average molecular weight is 200 ten thousand, three-well chemistry;
copolymer polypropylene: EP548R, melt flow rate: 25g/10min, medium sea Shell petrochemical Co., ltd;
flow modifier a: hyper C30, carboxyl-terminated hyperbranched polyester, wuhan hyperbranched resin technology Co., ltd;
flow modifier B: hyper H30, hydroxyl-terminated hyperbranched polyester, wuhan hyperbranched resin technology Co., ltd;
flow modifier C: polyethylene glycol, PEG-600, nantong, humus and chemical industry Co., ltd;
liquid hydrocarbon synthetic oil a: poly-alpha-olefin oil, elevast A80, kinematic viscosity (40 ℃ C., ASTM D445) of 69mm 2 S, exxon Mobil;
liquid hydrocarbon synthetic oil B: ethylene-propylene synthetic oil, LUCANT LX004, kinematic viscosity (40 ℃ C., ASTM D445) of 400mm 2 S, triple well chemistry;
liquid hydrocarbon synthetic oil C: ethylene-propylene synthetic oil, LUCANT LX010, kinematic viscosity (40 ℃ C., ASTM D445) 1300mm 2 S, triple well chemistry;
liquid hydrocarbon synthetic oil D: ethylene-propylene synthetic oil, LUCANT LX020, kinematic viscosity (40 ℃ C., ASTM D445) of 2200mm 2 S, triple well chemistry;
other auxiliary agents: the mass ratio of the antioxidant 1010 to the antioxidant 168 is 1:1; all purchased from basf. The preparation method of the ultra-high molecular weight polyethylene composition in examples and comparative examples comprises the following steps:
s1, uniformly mixing ultra-high molecular weight polyethylene, polypropylene copolymer, a flow modifier, liquid hydrocarbon synthetic oil and other auxiliary agents to obtain a premix;
s2, extruding and granulating the premix in the step S1 to obtain the ultra-high molecular weight polyethylene composition capable of being injection molded. The processing temperature of the extrusion is 200-240 ℃.
Examples 1 to 7
Examples 1-7 provide a series of injection moldable ultra high molecular weight polyethylene compositions with specific component contents as shown in Table 1.
TABLE 1 content (parts) of Components of examples 1 to 7
Examples 8 to 15
Examples 8-15 provide a series of injection moldable ultra high molecular weight polyethylene compositions with specific component contents as shown in Table 2.
TABLE 2 content (parts) of Components of examples 8 to 15
Comparative examples 1 to 5
Comparative examples 1 to 5 provide a series of ultra high molecular weight polyethylene compositions which can be injection molded, the specific component contents are shown in Table 3.
TABLE 3 content (parts) of the components of comparative examples 1 to 5
Performance testing
Coefficient of friction: tested according to standard GB/T22895-2008;
abrasion: internal standard, single arm load: 500g; grinding wheel model: h-18; sample rotation speed: 60r/min; number of rotational friction: 5000 turns; evaluation items: mass change before and after abrasion, i.e. abrasion = m 0 (mass before abrasion treatment) -m 1 (mass after 5000 rotations in rotation), the smaller the abrasion, the better.
Normal injection molding standard: injection molding machine, HTB80, ningbo sea-sky machinery limited; temperature: 230 ℃; injection molding 102 x 356 x 2mm plates, wherein the surfaces of the parts are uniform and have no defects, and the appearance rating is excellent; the product is complete, but the surface is slightly flawed (fogged or uneven), the flawed area is less than or equal to 5%, and the appearance rating is good; the product has the phenomenon of lack of glue or defect area more than 5%, and the appearance rating is poor; under the condition of a conventional injection molding process, the molding cannot be performed normally, and the molding cannot be performed normally;
table 4 data for examples and comparative examples
From the above examples 8 to 13, it is understood that when the mass ratio of the liquid hydrocarbon synthetic oil to the flow modifier is 1: (0.5-2), injection molding can be achieved, abrasion and friction coefficient are lower, the effect of injection molding appearance is better, injection molding cannot be achieved without adding one of the copolymer polypropylene, the flow modifier or the liquid hydrocarbon synthetic oil as seen in comparative examples 1-3, the content of the flow modifier or the liquid hydrocarbon synthetic oil is too high as seen in comparative examples 4 and 5, injection molding can be achieved, but the abrasion and friction coefficient are both high, and the appearance of the product does not meet the application requirements.
It is to be understood that the above examples of the present invention are provided by way of illustration only and not by way of limitation of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (9)
1. An injection-moldable ultra-high molecular weight polyethylene composition, which is characterized by comprising the following components in parts by weight:
the flow modifier is polyethylene glycol and/or hyperbranched resin dispersant;
the liquid hydrocarbon synthetic oil is one or more of alpha-olefin oligomer or ethylene and alpha-olefin copolymer.
2. The ultra high molecular weight polyethylene composition which is injection moldable according to claim 1, wherein the mass ratio of said liquid hydrocarbon synthetic oil to said flow modifier is 1: (0.5-2).
3. The ultra-high molecular weight polyethylene composition according to claim 1, wherein said hyperbranched resin-based dispersant is one or more of a polyester-based hyperdispersant, a polyether-based hyperdispersant or a polyolefin-based hyperdispersant.
4. The ultra-high molecular weight polyethylene composition which can be injection molded according to claim 1, wherein the other auxiliary agent is an antioxidant and/or a lubricant.
5. The ultra-high molecular weight polyethylene composition capable of injection molding according to claim 1, wherein the ultra-high molecular weight polyethylene has a weight average molecular weight of 100 to 500 tens of thousands.
6. The ultra-high molecular weight polyethylene composition according to claim 1, wherein said copolymerized polypropylene has a melt flow rate of 1 to 100g/10min at 230 ℃/2.16 kg.
7. The method for producing an injection moldable ultra high molecular weight polyethylene composition according to any one of claims 1 to 6, comprising the steps of:
s1, uniformly mixing ultra-high molecular weight polyethylene, polypropylene copolymer, a flow modifier, liquid hydrocarbon synthetic oil and other auxiliary agents to obtain a premix;
s2, extruding and granulating the premix in the step S1 to obtain the ultra-high molecular weight polyethylene composition capable of being injection molded.
8. The method for preparing an ultra-high molecular weight polyethylene composition capable of injection molding according to claim 7, wherein the extrusion processing temperature is 200 to 240 ℃.
9. Use of an injection moldable ultra high molecular weight polyethylene composition of any one of claims 1 to 6 for the manufacture of a mechanical part article.
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| CN108774349A (en) * | 2018-06-22 | 2018-11-09 | 上海化工研究院有限公司 | A kind of UHMWPE melting extrusions level composite material and preparation method thereof, moulding process and application |
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