石墨填充PP-HDPE复合材料的电性能研究

摘要采用聚丙烯(PP)和高密度聚乙烯（HDPE）共混物为基体材料，以石墨为导电填料，通过熔融共混法制备了导电复合材料。重点研究了石墨在两相基体中的分散情况以及复合体系的电学性能。扫描电镜测试结果表明:石墨粒子选择性的分散在共混物基体中，构成双渗流导电网络结构。电性能测试结果显示:在相同石墨含量下双基体体系的室温电阻率与GP/HDPE相比下降了1～4个数量级。同时，双渗流导电网络结构的存在部分消除了负温度系数（NTC）效应，提高了热循环稳定性。

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	郑桂成
	赵文元

关键词：石墨导电复合材料双渗流网络电学性能

Abstract： The conductive composites were prepared by melt blending with conductive graphite (GP) , polypropylene (PP) and polyethylene (PE). The dispersion of graphite in the two phase matrix and the electrical properties of the composite were investigated. SEM result indicates that the graphite particles are selectively located in the matrix，the doublepercolated networks reduce the percolation threshold and improve the conductivity. Compared with GP /HDPE-PP composite, the volumatic resistivity of composites decreases by 1—4 orders of magnitude at the same filler content. Meanwhile, the negative temperature coefficient effect is inhibited and the stability of the electrical properties is improved, due to the existence of the double-percolated networks.

Keywords： graphite conductive polymer composite doublepercolated network electrical properties

Received 2011-11-10;

Corresponding Authors: 赵文元 Email: wyzhao2001@163.com

About author: 郑桂成（1988-），男，山东潍坊人，硕士研究生，现从事高分子复合材料研究。

引用本文:

郑桂成, 赵文元.石墨填充PP-HDPE复合材料的电性能研究[J]. 化学工业与工程, 2012,29(2): 15-19

ZHENG Gui-Cheng, ZHAO Wen-Yuan.Electrical Properties of Graphite Filled PP-HDPE Composites[J]. Chemcial Industry and Engineering, 2012,29(2): 15-19

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