文献类型：期刊文献

英文题名：The influence of crystalline and aggregate structure on PTC characteristic of conductive polyethylene carbon black composite

作者：Luo, YL; Wang, GC; Zhang, BY; Zhang, ZP

机构：[1]E China Univ Chem Technol, Inst Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：1998

卷号：34

期号：8

起止页码：1221

外文期刊名：EUROPEAN POLYMER JOURNAL

收录：;EI(收录号：2004057867723);WOS:【SCI-EXPANDED(收录号:WOS:000075314700024)】；

语种：英文

摘要：The relationship between conductivity and morphological structure of a polyethylene/carbon black composite (PE/CB) was investigated by DSC, WAXD and SAXS, and a new interpretation of the PTC (positive temperature coefficient) effect has been proposed. The PTC intensity enhanced:with increased crystallinity for the PE/CB system; a substantial PTC effect was not discovered in an amorphous polymer/CB system. The behaviour of melting, crystallization and aggregate "large size" properties of the polymer matrix were modified by annealing, which in turn made the PTC intensity increase. It is pointed out that not only crystallinity, but also long spacing and lamellar size, also affect the PTC performances. (C) 1998 Elsevier Science Ltd. All rights reserved.