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Thermal, mechanical, and dielectric properties of polystyrene/expanded graphite nanocomposites
Author(s) -
Goyal R. K.,
Jagadale P. A.,
Mulik U. P.
Publication year - 2008
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.29042
Subject(s) - materials science , nanocomposite , dielectric , composite material , polystyrene , dissipation factor , thermal stability , graphite , dielectric loss , polymer , modulus , chemical engineering , engineering , optoelectronics
We herewith report the thermal, mechanical (modulus), and dielectric properties of polystyrene (PS)/expanded graphite (EG) nanocomposites fabricated by a simple technique of dispersing EG (up to 2.5 vol %) in PS matrix via solution method followed by hot pressing. The thermal stability and char yield of the nanocomposites are improved marginally. The modulus, electrical conductivity, dielectric constant, and dielectric loss tangent of the nanocomposites are significantly increased with EG content. The modulus of the nanocomposites increases by about twofold at 30°C compared with that of pure PS. The dielectric constant and the loss tangent of nanocomposites are increased up to 13‐fold and 200‐fold compared with that of pure PS, respectively, at 1 MHz and varied with frequency. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2009

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