高等学校化学学报

高等学校化学学报 ›› 2004, Vol. 25 ›› Issue (6): 1186.

• 研究简报 • 上一篇    

CB/HDPE导电复合体系中Kerner-Nielson方程修正及电渗流与粘弹渗流的相关性

郑强, 吴刚, 沈烈, 宋义虎   

  1. 浙江大学高分子科学与工程学系, 杭州 310027
  • 收稿日期:2003-03-21 出版日期:2004-06-24 发布日期:2004-06-24
  • 通讯作者: 郑　强(1960年出生),男,博士,教授,博士生导师,主要从事聚合物流变学研究.E-mail:zhengqiang@zju.edu.cn E-mail:zhengqiang@zju.edu.cn
  • 基金资助:

    国家自然科学基金(批准号:50133020,50003007);国家杰出青年科学基金(批准号:50125312)资助

Modification of Kerner-Nielson Equation and Correlation Between Electrical Percolation and Viscoelastic Percolation in CB/HDPEConductive Composites

ZHENG Qiang, WU Gang, SHEN Lie, SONG Yi-Hu   

  1. Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
  • Received:2003-03-21 Online:2004-06-24 Published:2004-06-24

PDF (PC)

被引次数

32

摘要： 随着导电填料含量的增加,聚合物导电复合材料的电导率呈现非连续的递增.当填料含量达到渗流阈值并导致渗流现象出现时,导电填料相互聚集并形成网络,体系电导率急剧增大,关于此类电渗流现象已有很多报道[1～4].填充类导电复合材料的结构和性能与其粘弹性密切相关.近年来,由于炭黑填充使得许多光学方法失效,流变学方法受到了广泛重视.最新的研究发现,非均相结构的出现和演化对浓度的依赖性有着特征流变响应,是一种粘弹渗流现象[5～7].

关键词: 炭黑/高密度聚乙烯导电复合体系, 渗流, 动态粘弹性, Kerner-Nielson方程修正式

Abstract: The study on the correlation between electrical percolation and viscoelastic percolation for carbon black（CB） filled high-density polyethylene（HDPE）conductive composites was carried out through examining the filler volume fraction dependence of the volume resistivity（ρ） and normalized dynamic storage modulus,G'c/G'p,in which G'c,G'p are dynamic storage modulus of the composites and the matrix respectively. The results revealed that the critical filler volume fraction of viscoelastic percolation approached the lower threshold（φ1） of the electrical percolation,indicating an insulator-semiconductor change corresponding to the beginning of network structure formation. Substituting K for A,a modified Kerner-Nielson equation was obtained and used to analyze the formation of network structure. It is suggested that parameter K is associated with CB volume fraction.

Key words: CB/HDPE conductive composite system, Percolation, Dynamic viscoelasticity, Modified Kerner-Nielson equation

中图分类号: 

TrendMD: