Saini, Parveen and Choudhary, Veena and Sood, K. N. and Dhawan, S. K. (2008) Electromagnetic interference shielding behavior of polyaniline/graphite composites prepared by in situ emulsion pathway. Journal of Applied Polymer Science , 113 (5). pp. 3146-3155. ISSN 1097-4628

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Abstract

Polyaniline–graphite composites were prepared via in situ emulsion pathway, using different weight ratios of aniline to graphite. These composites were characterized for thermal, electrical, and spectral attributes. The thermal stability (∼ 230°C) and electrical conductivity (67.9 S/cm) were improved significantly as compared with polyaniline doped with conventional inorganic dopants such as HCl (140°C and 10 S/cm). Scanning electron micrographs indicated a systematic change in morphology from globular to flaky with increasing amounts of graphite. The relative shifting of UV–visible bands indicates that some interactions exist between doped polyaniline and graphite. Absorption-dominated total electromagnetic interference shielding effectiveness of the order of −33.6 dB suggests that these materials can be used as futuristic microwave shielding materials. The good electrical conductivity and thermal stability make them ideal candidates for preparing conducting composites by melt blending with conventional thermoplastics such as polyethylene, polypropylene, and polystyrene etc.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Wiley-Blackwell
Uncontrolled Keywords:	polyaniline; graphite; conducting polymers; emulsion polymerization; EMI shielding effectiveness; microwave absorption
Subjects:	Polymer Science
Divisions:	UNSPECIFIED
Depositing User:	Ms Neetu Chandra
Date Deposited:	27 Aug 2012 12:01
Last Modified:	27 Aug 2012 12:01
URI:	http://npl.csircentral.net/id/eprint/483

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