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Preparation method of organic filler rigid toughening ultra high molecular weight polyethylene alloy

An ultra-high molecular weight, organic particle technology, applied in the field of polymer science, can solve problems such as low stiffness, difficult processing and molding, and no fluidity

Active Publication Date: 2009-02-04
SHANGHAI RES INST OF CHEM IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, UHMWPE also has shortcomings, such as low rigidity and no fluidity, which bring great difficulties to processing and molding. It can only be processed by compression molding or plunger extrusion molding, which limits the application of UHMWPE resin.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] After mixing 90 parts of ultra-high molecular weight polyethylene with a viscosity-average molecular weight of 2.5 million and 10 parts of polyethylene with a viscosity-average molecular weight of 500,000 at high speed, extrude and granulate through a twin-screw extruder, and control the temperature of the extrusion melt at 210°C. The extruded ultra-high molecular weight polyethylene alloy is dried for later use.

[0020] Mix the above-mentioned 100 parts of ultra-high molecular weight polyethylene alloy, 4 parts of polyamide 66 particles, 10 parts of polyethylene and maleic anhydride graft copolymer, and 1 part of antioxidant 1010 at high speed, and then use a single-screw injection molding melt machine for the mixture Injection molding melt molding products, the injection melt temperature is controlled at 260°C, the pressure is 90MPa, the injection melt time is 10 seconds, and the pressure holding and cooling time is 30 seconds.

Embodiment 2

[0022] After mixing 90 parts of ultra-high molecular weight polyethylene with a viscosity-average molecular weight of 1.5 million and 10 parts of polyethylene with a viscosity-average molecular weight of 200,000 at high speed, extrude and granulate through a twin-screw extruder, and control the temperature of the extrusion melt at 190°C. The extruded ultra-high molecular weight polyethylene alloy is dried for later use.

[0023] Mix the above-mentioned 100 parts of ultra-high molecular weight polyethylene alloy, 5 parts of polyamide 66 particles, 10 parts of polyethylene and maleic anhydride graft copolymer, and 0.5 parts of antioxidant 1010 at high speed, and then use a single-screw injection molding melt machine for the mixture Injection molding melt molding products, the injection melt temperature is controlled at 260°C, the pressure is 90MPa, the injection melt time is 10 seconds, and the pressure holding and cooling time is 30 seconds.

Embodiment 3

[0025] After mixing 90 parts of ultra-high molecular weight polyethylene with a viscosity-average molecular weight of 1.5 million and 10 parts of polypropylene with a viscosity-average molecular weight of 500,000 at high speed, extrude and granulate through a twin-screw extruder, and control the temperature of the extrusion melt at 200 ° C. The extruded ultra-high molecular weight polyethylene alloy is dried for later use.

[0026] Mix the above-mentioned 100 parts of ultra-high molecular weight polyethylene alloy, 1 part of polyamide 66 particles, 5 parts of polypropylene and maleic anhydride graft copolymer, and 1 part of antioxidant 1010 at high speed, and then use a single-screw injection molding melt machine for the mixture Injection molding melt molding products, the injection melt temperature is controlled at 260°C, the pressure is 90MPa, the injection melt time is 10 seconds, and the pressure holding and cooling time is 30 seconds.

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PUM

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Abstract

The invention relates to a preparation method of ultrahigh molecular weight polyethylene alloy of rigid toughening organic particles. According to the weight ratio in the method, 100 portions of ultra-high molecular weight polyethylene / polyolefin alloy, 1 to 10 portions of organic rigid particles, 5 to 20 portions of polymer interface bridge tackifier and 0.5 to 2 portions of antioxidant are mixed at high speed, and then the mixture is melted for injection molding by a single-screw injection molding machine to produce the finished products, wherein, the temperature of injection molding is controlled at 250 to 270 DEG C. Compared with the prior art, the invention not only improves the mobility of the ultra-high molecular weight polyethylene, but also improves the impact strength and tensile strength, thus the novel ultra-high molecular weight polyethylene has excellent overall mechanical properties.

Description

technical field [0001] The invention belongs to the field of polymer science and relates to a preparation method of an ultra-high molecular weight polyethylene alloy rigidly toughened by organic particles. Background technique [0002] Compared with the traditional mechanism of rubber toughening and toughening polymer materials, the toughening cold stretching mechanism of rigid organic filler (Rigid Organic Filler, referred to as ROF) toughened plastics has appeared abroad. Kurauchi and Ohta found in the mechanical properties of the PC / AS (acrylonitrile styrene copolymer) blend system, especially in the energy absorption of the blend, that the brittle AS has a significant toughening effect on PC, and proposed the ROF enhancement Tough theory. [0003] For composites containing dispersed particles, during the stretching process, due to the difference between the Young's modulus and Poisson's ratio of the dispersed spheres (E2, T2) and the matrix (E1, T1), the equatorial plan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L77/02C08L77/06C08L69/00C08L67/02C08L59/02C08L25/06C08L51/06C08K5/13C08K5/134B29C45/78B29C47/92B29B9/00B29C48/92
CPCB29C47/92
Inventor 张炜麦永懿吴向阳张玉梅洪尉赵春保
Owner SHANGHAI RES INST OF CHEM IND