Study of electrical and dielectric properties of styrene-acrylonitrile/graphite sheets composites

被引：38

作者：

Panwar, Varij ^{[1
]}

Mehra, R. M. ^{[1
]}

机构：

[1] Univ Delhi, Dept Elect Sci, New Delhi 110021, India

来源：

EUROPEAN POLYMER JOURNAL | 2008年 / 44卷 / 07期

关键词：

polymer composites; SAN/GS; dielectric constant; hardness;

D O I：

10.1016/j.eurpolymj.2008.05.005

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

This paper reports the structural, electrical, dielectric and mechanical properties of the Styrene-acrylonitrile (SAN)/graphite sheets (GS) composites. The composites were prepared by in situ polymerization. The variation of electrical conductivity, dielectric constant and ac conductivity as a function of volume fraction of GS was found to follow the power law model. The dielectric constant and dissipation factor of SAN/GS composites increased significantly near the percolation. The frequency dependence of dielectric constant, dissipation factor and ac conductivity was also analyzed. Nearly ohmic behavior of current density with electric field was observed above the percolation threshold. The composite was found to possess the hardness of pure polymer at the threshold value of GS. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：2367 / 2375

页数：9

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