摘要
采用共混法制备了以低密度聚乙烯为基体的含碳黑的导电复合材料 ,考察了导电复合材料的摩擦磨损性能及正温度系数特性 ,同时探讨了导电复合材料的摩擦熔融现象对其摩擦磨损性能的影响 .结果表明 :当低密度聚乙烯基导电复合材料与 GCr15钢配副时 ,在较高 pv值下 ,摩擦系数呈现周期性降低现象 ;温度对复合材料的导电性能具有重要影响 ,而聚四氟乙烯及聚苯酯等辅助导电剂对其 PTC特性无影响 .
Low-density polyethylene (LDPE) matrix conductive composites containing carbon black (CB) were prepared by mold compression. The effect of friction-induced melting on the friction and wear behaviour of the composites was explored. As the results, the electric conductivity of the composite is highly dependent on temperature; the auxiliary electric conductive agents such as polytetrafluoroethylene (PTFE) and ekonol have no effect on the PTC characteristic of the composite. A periodical decrease of the friction coefficient has been observed under a relatively high pv value in sliding of the composite pin against AISI1045 steel disc. This is related to the friction-induced melting of the LDPE matrix during the sliding process.
出处
《摩擦学学报》
EI
CAS
CSCD
北大核心
2001年第1期63-66,共4页
Tribology
基金
国家自然科学基金!资助项目 (5 9475 0 33)
教育部现代设计及轴承转子系统开放实验室基金!资助项目 (97-0 2 )
关键词
低密度聚乙烯
复合材料
正温度系数
摩擦磨损性能
电接触器件
Composite materials
Conductive plastics
Low density polyethylenes
Positive temperature coefficient
Wear of materials