Analysis and control of conductor/insulator transition phenomena in the electrically conductive filler dispersed polymer composites

点击翻译按钮获取中文摘要

In this project, we have studied predominant factors, theoretical analysis, and control techniques of the positive temperature coefficient (PTC) effect of electrically conductive filler dispersed polymer composites. We have obtained following results. (1) Main factors affecting PTC effect of composites were types of filler and filler content in composites. (2) Composites composed of amorphous polymer exhibited a PTC effect comparable to that of composites composed of crystalline polymer. (3) A theoretical analysis of resistivity change determined that the resistivity increases exponentially with an increase in gap length of fillers on the level of a nanometer. (4) In PVDF/Ni composites, onset temperatures of PTC effect were controlled by Ni content.