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以聚碳酸酯/丙烯腈-丁二烯-苯乙烯共聚物(PC/ABS)基体、不锈钢纤维(SSF)为填充剂,制备了PC/ABS/SSF导电复合材料。考察了SSF上浆处理、粒料长度、注射条件等对该导电复合材料性能的影响。结果表明:经上浆剂处理后,聚合物熔体对SSF的浸润性增强,因而使PC/ABS/SSF导电复合材料的力学性能明显提高。随着粒料长度及浇口直径的增加,SSF的保留长度增大,促进了导电网络的形成,进而提高了PC/ABS/SSF复合材料的导电性。另外,较低的模具温度更有利于SSF裸露在制品表面,从而得到导电性能更好的复合材料。
PC / ABS / SSF conductive composites were prepared by using polycarbonate / acrylonitrile-butadiene-styrene copolymer (PC / ABS) matrix and stainless steel fiber (SSF) as filler. The effects of SSF sizing, pellet length and injection conditions on the properties of the conductive composites were investigated. The results show that the wettability of the polymer melt to SSF increases after the sizing agent treatment, and the mechanical properties of the PC / ABS / SSF conductive composites are obviously improved. With the increase of particle length and gate diameter, the retention length of SSF increased, which promoted the formation of conductive network and improved the conductivity of PC / ABS / SSF composites. In addition, the lower mold temperature is more conducive to SSF exposed bare products, resulting in better conductive properties of composite materials.