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- 2016
不锈钢纤维-石墨/ABS-PVDF复合材料相转变与导电特性
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Abstract:
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/ABS-PVDF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 electrical properties and rheology for polymer based conductive composites were investigated, in which acrylonitrile-butadiene-styrene copolymer (ABS) and polyvinylidene fluoride (PVDF) were used as the matrix and stainless steel fibers (SSF) and graphite were used as conductive fillers, and the SSF-graphite/ABS-PVDF conductive composites were prepared by melt-blending method. The distribution of conductive filler, the conductive property and phase transition behavior of SSF/ABS-PVDF composite system were studied. The results show that SSF tends to locate in the PVDF phase, and when the SSF content is 20wt%, the electrical resistivity of SSF/ABS-PVDF composites decreases firstly, and after then reaches a platform region, finally decreases again with the increase of PVDF ratio. Phase transition behavior occurs when content of PVDF is 30wt%-40wt% and 70wt%-80wt% in ABS-PVDF composite matrix. A double percolation phenomenon appeares in the SSF-graphite/ABS-PVDF composites when content of SSF is 16.84wt% and 25wt%-30wt% which is consistent with the tendency of dynamic modulus and complex viscosity. 国家自然科学基金（51503061）；湖北省科技厅支撑计划（2015BAA094）；湖北省自然科学基金（2015CFB322）
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