Preparation method of wear-resistant heat-conducting irradiation-crosslinking ultra-high molecular weight polyethylene

A technology of ultra-high molecular weight and polyethylene, applied in the field of engineering plastic materials, can solve problems such as shape change, poor thermal conductivity, affecting product quality and production efficiency, etc., to improve heat resistance and mechanical strength, ensure basic performance, radiation Dose Reduction Effects

CN106633287AInactive Publication Date: 2017-05-10中广核高新核材科技(苏州)有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2017-05-10
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a preparation method of wear-resistant heat-conducting irradiation-crosslinking ultra-high molecular weight polyethylene. The preparation method comprises the following steps: adding ultra-high molecular weight polyethylene granules with the molecular weight of 2 million or so into 8 wt% of heat-conducting filler, boron nitride, 0.5 wt% of wear-resistant filler, carbon nanotubes, 1 wt% of crosslinking accelerator and 0.1 wt% of antioxidant to form a mixture; sufficiently mixing the mixture, sending the mixture into an extruder, melting by heating, and extruding by an extruder, wherein in the heating process, the temperature and pressure of the raw materials are controlled, and the thickness of the extruded material is kept at 1-10mm; and irradiating the obtained sample by gamma-rays of a cobalt source in air with the irradiation dose of 50-180 kGy, and putting the irradiation sample into a drying oven under vacuum conditions. On the premise of keeping the inherent properties of the ultra-high molecular weight polyethylene material stable, the method further enhances the wear resistance, heat-conducting property, temperature resistance and mechanical strength of the ultra-high molecular weight polyethylene material.
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Description

technical field

[0001] The invention relates to the technical field of engineering plastic materials, in particular to a preparation method of wear-resistant and heat-conductive irradiation cross-linked ultra-high molecular weight polyethylene. Background technique

[0002] According to the division method of Philips Petroleum Company of the United States, polyethylene with a molecular weight of more than 1.5 million is called "UHMWPE", that is, Ultra-high molecular weight PE, and it is called ultra-high molecular weight polyethylene in Chinese. Hoechst of Germany, Hercules of the United States and Mitsui Petrochemical Company of Japan are the three major companies producing UHMWPE in the world. The main manufacturers in China are Beijing Auxiliary No. 2 Plant, Shanghai Takahashi Petrochemical The company's chemical plant, Sinopec Qilu Petrochemical Branch.

[0003] The extremely high molecular weight of UHMWPE (the molecular weight of HDPE is usually only 20,000-300,000) e...

Examples

Embodiment 1

[0027] The preparation steps of the wear-resistant and heat-conductive irradiation cross-linked ultra-high molecular weight polyethylene material of the present invention are as follows: using ultra-high molecular weight polyethylene pellets with a molecular weight of about 2 million as raw materials, adding 8wt% of heat-conducting fillers, Boron nitride (BN), 0.5wt% wear-resistant filler, carbon nanotubes (CNT), 1wt% multifunctional crosslinking accelerator triallyl isocyanurate (TAIC), and 0.lwt% antioxidant 4,4'-Thiobis(6-tert-butyl-3-methylphenol), after being fully mixed, sent to the extruder, heated and melted, then extruded from the extruder. During the heating process, the temperature and pressure of the raw materials are controlled, and the thickness of the extruded material is kept at 1-10mm. The obtained sample was irradiated with cobalt source gamma rays in air, the irradiation dose was 100 kGy, and the dose rate was 5 kGy / h. The irradiated sample is placed in an ...

Embodiment 2

[0032] The preparation steps of the wear-resistant and heat-conductive irradiation cross-linked ultra-high molecular weight polyethylene material of the present invention are as follows: using ultra-high molecular weight polyethylene pellets with a molecular weight of about 3 million as raw materials, adding 6wt% of heat-conducting fillers, Boron nitride (BN), 1wt% wear-resistant filler, carbon nanotubes (CNT), 1.5wt% multifunctional crosslinking accelerator triallyl cyanurate (TAC), and 0.3wt% antioxidant 4, 4′-Thiobis(6-tert-butyl-3-methylphenol), mixed thoroughly, sent to extruder, heated and melted, extruded by extruder. During the heating process, the temperature and pressure of the raw materials are controlled, and the thickness of the extruded material is kept at 1-10mm. The obtained samples were irradiated with high-energy electron beams in air, the irradiation dose was 100kGy, and the dose rate was 440000kGy / h. The irradiated samples were annealed in constant tempera...