| 聚氯乙烯/炭黑导电复合体系的压阻行为 |
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| 引用本文： | 徐文武,宋义虎,周剑锋,郑强,章明秋.聚氯乙烯/炭黑导电复合体系的压阻行为[J].高等学校化学学报,2005,26(6):1170-1173. |
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| 作者姓名： | 徐文武 宋义虎 周剑锋 郑强 章明秋 |
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| 作者单位： | 1. 浙江大学高分子科学与工程学系,杭州,310027
2. 中山大学材料科学研究所,广州,510275 |
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| 基金项目： | 国家自然科学基金;国家自然科学基金 |
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| 摘 要： | 研究了聚氯乙烯／炭黑(PVC／CB)导电复合体系在单轴压力作用下的压阻行为，发现CB含量对电阻一机械响应具有显著的影响．当CB含量低于渗流阈值时，PVC／CB复合材料呈现PPC效应；而高于渗流阈值时，呈现NPC效应．在渗流阈值附近，单轴压缩可诱导NPC效应的出现，或者抑制PPC效应。
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| 关 键 词： | 聚氯乙烯 炭黑 压阻行为 单轴压缩-解压缩 唯象模型 |
| 文章编号： | 0251-0790(2005)06-1170-04 |
Piezoresistance Behavior of Polyvinyl Chloride/Carbon Black Conductive Composites |
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| XU Wen-wu,SONG Yi-hu,ZHOU Jian-Feng,ZHENG Qiang,ZHANG Ming-qiu.Piezoresistance Behavior of Polyvinyl Chloride/Carbon Black Conductive Composites[J].Chemical Research In Chinese Universities,2005,26(6):1170-1173. |
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| Authors: | XU Wen-wu SONG Yi-hu ZHOU Jian-Feng ZHENG Qiang ZHANG Ming-qiu |
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| Abstract: | The piezoresistive behavior of polyvinyl chloride/carbon black(PVC/CB) conductive composites subjected to uniaxial compression-decompression cycles was studied. The composites exhibited a significant piezoresistance, when CB mass fraction w was located in the vicinity of the percolation threshold w__c. The composites displayed a positive pressure coefficient(PPC) effect at ww__c. Uniaxial compression might facilitate the NPC effect or weaken the PPC effect when w was located in the vicinity of w__c. |
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| Keywords: | Poly(vinyl chloride) Carbon black Piezoresistance behavior Uniaxial compression-decompression Phenomenological model |
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