研究了二硼化钛填充聚合物基导电复合材料的电性能和温度-电阻特性.导电复合材料的电阻随着二硼化钛填充量的增加逐渐降低;当二硼化钛填充量达到某一临界值时,导电复合材料的电阻急剧下降成低阻状态.导电复合材料的电阻随着温度的升高逐渐增加;当温度接近聚合物熔融温度时,导电复合材料出现从低阻到高阻的突变.对导电复合材料进行电子束辐射交联,可以消除电阻负温度效应现象.%The conductivity properties and temperature-resistance characteristic of polymeric conductive composites filled by titanium diboride are investigated.The resistance of conductive composites decreases slowly with the increasing content of titanium diboride,and then decreases rapidly to low resistance state when the content of titanium diboride reaches a critical value.The resistivity of conductive composites increases slowly with the increasing temperature,and then increases rapidly to high resistance state when the temperature reaches the melting temperature of the polymer.Electron beam radiation crosslinking can eliminate resistance negative temperature coefficient of the conductive composites.
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