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-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.
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 w<w__c and negative pressure coefficient(NPC) effect at w>w__c. Uniaxial compression might facilitate the NPC effect or weaken the PPC effect when w was located in the vicinity of w__c.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2005年第6期1170-1173,共4页
Chemical Journal of Chinese Universities
基金
国家杰出青年科学基金(批准号:50125312)
国家自然科学基金重点项目(批准号:50133020)资助.
关键词
聚氯乙烯
炭黑
压阻行为
单轴压缩-解压缩
唯象模型
Poly(vinyl chloride)
Carbon black
Piezoresistance behavior
Uniaxial compression-decompression
Phenomenological model
