采用溶液混合(SM)法制备HDPE/石墨导电复合材料,并研究其导电特性.在与熔融(MM)混合方法制备的同类复合导电材料对比的基础上,从微现形态的角度讨论了不同方法制备的复合材料导电性的差异及原因.结果表明,与MM法制备的复合材料相比,SM法制备的复合材料具有更明显的正温度系数(PTC)效应,PTC稳定性更好,在更窄的温度范围内出现PTC效应,并且PTC强度能达到近8个数量级.
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