Conductive mechanism of polymer/graphite conducting composites with low percolation threshold

doi:10.1002/polb.10141

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	Conductive mechanism of polymer/graphite conducting composites with low percolation threshold
	Zou, JF; Yu, ZZ; Pan, YX; Fang, XP; Ou, YC
刊名	JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
	2002-05-15
卷号	40 期号:10 页码:954-963
关键词	Polystyrene Nylon-6 Percolation Threshold Conducting Composites Expanded Graphite
ISSN号	0887-6266
DOI	10.1002/polb.10141
英文摘要	Preparation of the conducting composites of polystyrene/expanded graphite via in situ polymerization and investigation of the conductive mechanism were carried out. They are characterized by high conductivity and a low percolation threshold. The electrical conductivity reached 10(-2) S/cm with 3.0 vol % expanded graphite content, whereas the percolation threshold was 1.0 vol %. Optical micrographs revealed the heterogeneous distribution of the graphite particles and the formation of a conductive network in the polymer matrix. A model of primary particle was proposed to interpret the conductive phenomena. The primary particle is the basic conductive unit in the composites that comprises three of the following parts: the graphite particle, the compact-adsorbed layer, and the wrapping shell. Our model was also used to explain the experimental data in our previous studies on nylon-6/expanded graphite composites. A low percolation threshold of conducting composites can be also explained according to the model of the primary particle. Furthermore, the theoretical line of conductivity versus primary particle content calculated from the revised Flory's theory fits the experimental data well. (C) 2002 Wiley Periodicals, Inc.
语种	英语
出版者	JOHN WILEY & SONS INC
WOS记录号	WOS:000175073800005
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/79115]
专题	中国科学院化学研究所
通讯作者	Ou, YC
作者单位	Chinese Acad Sci, Inst Chem, Ctr Mol Sci, State Key Lab Engn Plast, Beijing 100080, Peoples R China
推荐引用方式 GB/T 7714	Zou, JF,Yu, ZZ,Pan, YX,et al. Conductive mechanism of polymer/graphite conducting composites with low percolation threshold[J]. JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS,2002,40(10):954-963.
APA	Zou, JF,Yu, ZZ,Pan, YX,Fang, XP,&Ou, YC.(2002).Conductive mechanism of polymer/graphite conducting composites with low percolation threshold.JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS,40(10),954-963.
MLA	Zou, JF,et al."Conductive mechanism of polymer/graphite conducting composites with low percolation threshold".JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS 40.10(2002):954-963.