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以丙烯腈-丁二烯-苯乙烯共聚物(ABS)和聚偏氟乙烯(PVDF)为基体,不锈钢纤维(SSF)和石墨为导电填料,通过熔融法制备SSF-石墨/ABS-PVDF导电复合材料,探究了其导电性能及流变性能。讨论了SSF/ABSPVDF复合体系中导电填料的分布、导电性能及基体的相转变行为。结果表明:SSF倾向于分布在PVDF相中,当SSF含量为20wt%时,SSF/ABS-PVDF复合材料的电阻率随PVDF比例增加,先降低经历一个平台期后继续降低。PVDF在ABS-PVDF复合基体中含量为30wt%~40wt%和70wt%~80wt%时,SSF/ABS-PVDF复合材料出现相态转变行为。当SSF含量为16.84wt%和25wt%~30wt%时SSF-石墨/ABS-PVDF复合材料出现二次逾渗的现象,且与其动态模量及复数黏度的变化相符合。
The SSF-graphite / ABS-PVDF conductive composites were prepared by melt method using ABS and PVDF as matrix, stainless steel fiber (SSF) and graphite as conductive fillers Materials, to explore the conductivity and rheological properties. The distribution of conductive filler, conductivity and matrix phase transition behavior in SSF / ABSPVDF composites were discussed. The results show that the SSF tends to distribute in the PVDF phase. When the SSF content is 20wt%, the resistivity of the SSF / ABS-PVDF composites increases with the increase of the PVDF content, and then decreases gradually after a plateau. The phase transition behavior of SSF / ABS-PVDF composite was observed when the content of PVDF in ABS-PVDF composite matrix was 30wt% ~ 40wt% and 70wt% ~ 80wt%. SSF-graphite / ABS-PVDF composites appeared percolation phenomenon when SSF content was 16.84wt% and 25wt% -30wt%, and it was consistent with the change of dynamic modulus and complex viscosity.