华南理工大学学报(自然科学版) ›› 2007, Vol. 35 ›› Issue (8): 80-82,88.

• 材料科学与技术 • 上一篇    下一篇

导电高分子复合材料逾渗阈值的预测

梁基照 杨铨铨   

  1. 华南理工大学 工业装备与控制工程学院,广东 广州 510640
  • 收稿日期:2006-12-05 出版日期:2007-08-25 发布日期:2007-08-25
  • 通信作者: 梁基照(1953-),男,博士,教授,博士生导师,主要从事聚合物复合材料制备及性能表征等方面的研究. E-mail:Liangjz@scut. edu.cn
  • 作者简介:梁基照(1953-),男,博士,教授,博士生导师,主要从事聚合物复合材料制备及性能表征等方面的研究.

Predication of Percolation Threshold of Conductive Polymer Composites

Liang Ji-zhao  yang Quan-quan   

  1. School of Industrial Equipment and Control Engineering , South China Univ. of Tech. , Guangzhou 510640 , Guangdong , China
  • Received:2006-12-05 Online:2007-08-25 Published:2007-08-25
  • Contact: 梁基照(1953-),男,博士,教授,博士生导师,主要从事聚合物复合材料制备及性能表征等方面的研究. E-mail:Liangjz@scut. edu.cn
  • About author:梁基照(1953-),男,博士,教授,博士生导师,主要从事聚合物复合材料制备及性能表征等方面的研究.

摘要: 逾渗阈值是表征导电高分子复合材料导电性能的重要参数之一,但是由于影响因素异常复杂,逾渗阈值的预测存在不确定性.文中从导电复合材料的微观角度出发,分析了导电高分子复合材料的逾渗行为及机理,并基于Flo巧的凝胶化理论和Bueche 的无限网链模型,提出了一种新的预测导电高分子复合材料逾渗阈值ψc 的方法,最后将理论预测值与其它研究成果进行了比较分析.结果表明:由此方法计算得到的逾渗阈值更加接近高密度聚乙烯/碳黑导电复合材料的实验结果.

关键词: 导电复合材料, 碳黑, 逾渗阈值, 预测, 凝胶化理论

Abstract:

Percolation threshold is one of the important parameters describing the conductive properties of conductive polymer composites. However , the prediction of percolation threshold is indeterminate due to the complicacy of the inf1uence factors. In order to solve this problem , this paper analyzes the percolation behavior and the mechanisni of conductive polymer composites from the view point of microscopic structure , and proposes a new method to predicate the percolation threshold ψc based on the Flory gelation theory and the Bueche infinite network model. A comparison of the predicted results with the results in the literature reveals that the proposed method may lead to a predicated percolation threshold which is even closer to the result from the experiment with conductive high-density polyethylenel carbon black composites.

Key words: conductive composite, carbon black, percolation threshold, prediction, gelation theory