导电高分子复合材料的有效电导率模型

基于Maxwell理论和平均极化理论,建立了导电高分子复合材料的有效电导率模型。有效电导率描述为各组成成分的体积、形状和颗粒尺寸的函数。利用该模型,讨论了渗流阈值与导电颗粒的大小及轴长比的关系,得到了导电高分子复合材料的有效电导率随导电颗粒轴长比和半径变化的规律。用该模型计算了碳纤维聚脂树脂复合材料的有效电导率,计算结果与实验结果符合较好。

An effective electric conductivity model for conductive polymer composites

Based on Maxwell theory and average polarization theory, a new model for effective electric conductivity of conductive polymer composite was established. The effective electric conductivity was investigated theoretically as a function of the electric conductivities of the constituents, the particle shape and size and the volume of loading. The relation between the percolation threshold and the axial ratio and the metal particle size of the metal particle was discussed by the model. Besides, the dependence of effective electric conductivity of metal-polymer composite on the shape and size of the metal particle was researched. Finally, the theoretical results on the effective electric conductivity of carbon fiber-polyester resin composites are in good agreement with the experimental data.