期刊
JOURNAL OF APPLIED POLYMER SCIENCE
卷 109, 期 6, 页码 3991-3999出版社
JOHN WILEY & SONS INC
DOI: 10.1002/app.28499
关键词
polystyrene; nanocomposites; dielectric properties; hardness
Present article reports the investigations of the electrical and dielectric properties of polystyrene/foliated graphite (PS/FG) nanocomposites. The homogenous embedded structure of FG within the polymer matrix has been confirmed by scanning electron microscopy (SEM). The electrical conductivity of the composite was found to exhibit insulator-conductor transition at a very low percolation threshold of FG. A nonlinear to linear transition in the current-voltage characteristics of the composites was observed when the composite undergoes insulator-conductor transition. The frequency dependence of dielectric constant, dissipation factor, and ac conductivity has also been analyzed using percolation theory. D-shore hardness of the nanocomposite was also tested to observe the strength of the composites. (C) 2008 Wiley Periodicals, Inc.
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