Characterization of Nanosilica-Filled Epoxy Composites for Electrical and Insulation Applications

Veena, M. G. and Renukappa, N. M. and Raj, J. M. and Ranganathaiah, C. and Shivakumar, K. N. (2011) Characterization of Nanosilica-Filled Epoxy Composites for Electrical and Insulation Applications. Journal of Applied Polymer Science, 121 (5). pp. 2752-2760.

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We report in this article the results of nanosilica (SiO2)-filled epoxy composites with different loadings and their electrical, thermal, mechanical, and free-volume properties characterized with different techniques. The morphological features were studied by transmission electron microscopy, and differential scanning calorimetry was used to investigate the glass-transition temperature (T-g) of the nanocomposites. The properties of the nanocomposites showed that the electrical resistivity (rho), ultimate tensile strength, and hardness of the composites increased with SiO2 weight fraction up to 10 wt % and decreased there-after; this suggested that the beneficial properties occurred up to this weight fraction. The temperature and seawater aging had a negative influence on rho; that is, rho decreased with increases in the temperature and aging. The free-volume changes (microstructural) in the composite systems correlated with seawater aging but did not correlate so well with the mechanical properties. (C) 2011 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 121: 2752-2760, 2011

Item Type: Article
Uncontrolled Keywords: crosslinking; glass transition; nanocomposites; structure-property relations; voids
Subjects: Physical Sciences > Physics
Divisions: PG Campuses > Manasagangotri, Mysore > Physics
Depositing User: Users 1 not found.
Date Deposited: 19 Mar 2013 05:54
Last Modified: 12 Sep 2014 09:31

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