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该文研究了注塑成型短切碳纤维填充聚合物基复合材料的电导性,应用渗透理论和比例法分析了纤维尺寸以及体积分数对电导的影响。渗透开始点的纤维体积分数被测得而且实现了三维计算机模拟,介绍了一种在临界点电导率下可以减小预算体积分数和实验体积分数差异的假想纤维壳体模型,按照模拟所得的临界体积分数Vc通过实验发现是由纤维的长径比来决定的,而纤维的表面化学性质对其影响很小。实验电导数据随着
In this paper, the conductivity of injection-molded chopped carbon fiber-filled polymer matrix composites was investigated. The influence of fiber size and volume fraction on conductivity was analyzed by using osmotic theory and proportional method. The fiber volume fraction at the infiltration start point was measured and a three-dimensional computer simulation was carried out. An imaginary fiber shell model which can reduce the difference between the budget volume fraction and the experimental volume fraction under the critical point conductivity was introduced. According to the simulation results The volume fraction of Vc is experimentally determined by the aspect ratio of the fiber, while the surface chemistry of the fiber has little effect on it. The experimental conductance data follows