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Partial Discharge Resistant Characteristics of Epoxy Nanocomposites

Preetha, P and Thomas, Joy M (2011) Partial Discharge Resistant Characteristics of Epoxy Nanocomposites. In: IEEE Transactions on Dielectrics and Electrical Insulation, 18 (1). pp. 264-274.

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Epoxy nanocomposite samples with a good dispersion of alumina nanoparticles in epoxy matrix were prepared and experiments were performed to measure their partial discharge resistant characteristics. Epoxy alumina nanocomposites with 0.1, 1, 5, 10 and 15 wt% nanofillers were prepared in the laboratory and partial discharge (PD) experiments were conducted at a voltage of 10 kV for different durations using IEC (b) type electrodes. The degradation of the sample surfaces were analyzed using SEM techniques, surface profile studies, FTIR spectroscopy as well as PD studies. An attempt was made to understand the interaction dynamics between the nanoparticle and the epoxy chain by measuring the glass transition temperature of the nanocomposites. The partial discharge resistance obtained for the nanocomposites are compared with those of unfilled epoxy and epoxy microcomposites. It was observed that even with 0.1 wt% of nanofiller added to the epoxy matrix, the partial discharge resistance to degradation gets improved considerably. It was also observed that the inter particle distance has a significant effect on the discharge resistance to degradation. The improvement in the degradation resistance is attributed to the interactions between the nanoparticle and the epoxy chain. A possible mechanism for the surface degradation of nanocomposites has been proposed.

Item Type: Journal Article
Publication: IEEE Transactions on Dielectrics and Electrical Insulation
Publisher: IEEE
Additional Information: Copyright 2011 IEEE. Personal use of this material is permitted.However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Keywords: Epoxy; nanocomposites; nanofiller; partial discharge; surface degradation
Department/Centre: Division of Electrical Sciences > Electrical Engineering
Date Deposited: 24 Mar 2011 06:11
Last Modified: 24 Mar 2011 06:11
URI: http://eprints.iisc.ac.in/id/eprint/36203

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