Electrical Properties of Carbon Black-Polyethylene Composites
Electrical Properties of Carbon Black-Polyethylene Composites
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炭黑-聚乙烯复合材料的电性能
DOI：
10.1295/polymj.21.609
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发表时间：
1989
期刊：
影响因子：
--
通讯作者：
F. Ozaki
中科院分区：
文献类型：
--
作者：
Y. Fujikura;Mitsugu Kawarai;F. Ozaki
测定了炭黑体积分数为0.16-0.28的炭黑-聚乙烯复合膜的电流密度与外加直流电场的关系。样品的电流密度与所施加的DC电场的关系曲线清楚地表明，首先，电流密度与所施加的DC电场成比例地增加，然后，在最大值之后，它们减小并且在高的所施加的DC电场下显示负电阻。曲线的形状对炭黑的体积分数、在样品膜成型期间先前施加的DC电压以及基体聚乙烯的密度非常敏感;然而由于炭黑的粒度或基体聚乙烯的熔融指数几乎没有影响。这一发现可以用载流子隧穿势垒和炭黑粒子间库仑力的产生来解释。
The relationship between current density and applied DC electric field was measured for carbon black-polyethylene composite films which contain large amounts of carbon black by volume fraction (vf≒0.16–0.28). The curves relating the current density to the applied DC electric field for the samples show clearly that, at first, the current densities increase in proportion to the applied DC electric fields and then, after the greatest values, they decrease and show negative resistance at high applied DC electric fields. The shapes of the curves are very sensitive to the volume fraction of the carbon black, to a previously applied DC voltage during the sample film molding, and to the density of the matrix polyethylene; yet there is almost no influence due to the particle size of the carbon black or to the melt index of the matrix polyethylene. This finding can be explained well by the tunneling of carriers across the barriers and the generation of Coulomb forces among the carbon black particles.