单轴压力对高密度聚乙烯/碳黑导电复合材料电阻特性的影响

高等学校化学学报 ›› 2000, Vol. 21 ›› Issue (3): 475.

单轴压力对高密度聚乙烯/碳黑导电复合材料电阻特性的影响

宋义虎¹, 郑强¹, 潘颐¹, 益小苏^1,2

1. 浙江大学高分子科学与工程学系, 杭州 310027;
2. 先进复合材料国防重点实验室, 北京 100095

收稿日期:1999-06-07 出版日期:2000-03-24 发布日期:2000-03-24
通讯作者: 郑　强(1960年出生),男,博士,教授,主要从事多组分聚合物体系结构与性能关系、聚合物流变学研究.
基金资助:
国家“863”重点项目(批准号:7150070080);国家自然科学基金(批准号:59973018)资助

Effect of Uniaxial Pressures on the Resistance of High Density Polyethylene/Carbon Black Composites

SONG Yi-Hu¹, ZHENG Qiang¹, PAN Yi¹, YI Xiao-Su^1,2

1. Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China;
2. National Key Laboratory of Advanced Composites, Beijing 100095, China

Received:1999-06-07 Online:2000-03-24 Published:2000-03-24

摘要/Abstract

摘要： 研究了高密度聚乙烯/炭黑导电复合材料在单轴压力作用下电阻的变化规律.结果表明,在低压力下,复合材料电阻随压力增加而降低;而在较高压力下则随压力增大而升高,分别呈现出所谓的“电阻负压力系数”和“电阻正压力系数”效应.电阻的压力依赖性以及由压缩引起的电阻不可回复性,被认为与外力作用下导电网络的重组与破坏有关.由此提出了导电复合材料单轴压力作用-电阻相互关系的唯象模型.

关键词: 高密度聚乙烯/碳黑复合材料, 单轴压力-电阻特性, 导电模型

Abstract: The relationship between uniaxial pressures and resistance of high density polyethylene/carbon black(HDPE/CB) composites was studied. The results showed that there existed a critical pressure below which composite resistance decreased with the increase of pressure and above which resistance increased with the increase of pressure. Correspondingly, these behaviors were defined as negative and positive pressure coefficient of resistance in this work. There existed obvious electrical hysteresis during unloading procedures. Nonrecoverable resistance was found when pressures approached to zero. It was believed that the uniaxial pressures resistance relations were involved in the reformation and destructure of conductive network under pressures. Asimple piezoresistive model was proposed phenomenologically to explain the experimental results.

Key words: HDPE/CB composites, Uniaxial pressures-resistance relation, Conduction model

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宋义虎, 郑强, 潘颐, 益小苏. 单轴压力对高密度聚乙烯/碳黑导电复合材料电阻特性的影响. 高等学校化学学报, 2000, 21(3): 475.

SONG Yi-Hu, ZHENG Qiang, PAN Yi, YI Xiao-Su. Effect of Uniaxial Pressures on the Resistance of High Density Polyethylene/Carbon Black Composites. Chem. J. Chinese Universities, 2000, 21(3): 475.