摘要
为了制备柔性较好的聚合物基压阻材料,利用熔融共混法制备了炭黑/聚丙烯-聚(苯乙烯-乙烯/丁烯-苯乙烯)(CB/PP-SEBS)复合材料,并研究了CB含量对CB/PP-SEBS复合材料介电性能和压阻性能的影响。结果表明:随着CB含量的增加,CB/PP-SEBS复合材料的介电常数、介电损耗及电导率均提高;CB/PP-SEBS复合材料发生导电逾渗时,CB的含量为12.2wt%;在CB/PP-SEBS复合材料发生弹性形变时,由于外力破坏了CB的导电网络,复合材料的电阻随着应变的增大而增大;循环压阻测试结果显示,在弹性变形区CB/PP-SEBS复合材料的电阻随着应变呈现周期性变化。研究结果可为制备具有稳定电阻变化的聚合物基压阻材料提供借鉴。
In order to prepare polymer piezoresistive materials with good flexibility,carbon black/polypropylenepoly(styrene-ethylene/butylene-styrene)(CB/PP-SEBS)composites were fabricated through melt blending method.The effects of CB content on the dielectric properties and piezoresistive properties of CB/PP-SEBS composites were investigated.The results indicate that the dielectric constant,dielectric loss and electrical conductivity of CB/PPSEBS composites are all enhanced with the increasing of CB content.The electrical conductivity percolation of CB/PP-SEBS composites occurs when the CB content is 12.2wt%.Owing to the external force destruction of conductive network of CB,the electrical resistivity of CB/PP-SEBS composites increases with the strain increasing during the elastic deformation process of CB/PP-SEBS composites.The periodic piezoresistive measurement results indicate that the electrical resistivity of CB/PP-SEBS composites varies periodically with strain in the elastic deformation region.The results could give some experience for the preparation of polymer piezoresistive materials with stable resistance variation.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2015年第3期756-761,共6页
Acta Materiae Compositae Sinica
基金
北京市教育委员会科技计划面上项目(KM2015100120095)
关键词
聚丙烯
炭黑
介电常数
逾渗
电阻
polypropylene
carbon black
dielectric constant
percolation
electrical resistance
