中文摘要：

以钨配合物为主催化剂,AlEt2Cl为助催化剂,表面改性CuS纳米粉体为填料,采用反应注射成型工艺,原位聚合方法制备了纳米CuS/聚双环戊二烯（CuS/PDCPD）复合材料。利用红外光谱、扫描电镜、透射电镜、三维轮廓测定仪、高温气氛摩擦磨损试验机等多种手段对表面改性CuS纳米粉体及纳米CuS/PDCPD复合材料的结构、填料分散性、磨损形貌、力学性能以及摩擦磨损性能进行了表征和测试。结果表明,改性CuS在极低的添加范围内,即可实现对PDCPD同时起到增强增韧和耐磨的作用;在CuS添加质量分数为1%时,纳米CuS/PDCPD复合材料的综合性能达到最佳;与PDCPD性能相比,冲击强度、拉伸强度和弯曲强度的最大提高量分别为13.2%、22.0%、13.8%;磨损质量和摩擦因数最大降低了31%和36%。表面改性CuS纳米粉体在PDCPD基体中具有良好的界面相容性,是实现纳米CuS/PDCPD复合材料在低添加范围内具有较佳力学性能和耐磨性能的重要原因。

英文摘要：

Nanometer copper sulfide/polydicyclopentadiene（nano-CuS/PDCPD） composites were successfully prepared by the reaction injecting molding,using tungsten complex as the main catalyst,diethyl aluminium chloride（Et2AlCl） as the cocatalyst,and surface modified CuS nanopowders as the additive.The structure,dispersion of the fillers,worn surface,mechanical properties and friction and wear performance of the as-obtained CuS nanopowders and nano-CuS/PDCPD composities were characterized and tested by many technologies,such as FTIR,SEM,TEM,3D morphology meter,and high-temperature atmosphere friction/wear tester.The results indicate that the mechanical property and friction and wear performance of nano-CuS/PDCPD composities are significantly enhanced compared to that of pristine PDCPD when surface modified CuS nanopowders are used in low addition range,and the comprehensive properties achieve their optimum with CuS mass fraction of 1%.The most increased values of impact strength,tensile strength,and bending strength are 13.2%,22.0% and 13.8%,respectively.The wear mass and friction coefficient decrease 31% and 36%,respectively.The well interface compatibility between the particle/matrix interfaces plays an important role for the improved mechanical and tribological properties of nano-CuS/PDCPD composities in low CuS loadings.