Effect of Fillers on Electrical Conductivity of Epoxy Composites

Authors

  • Srinivas Krishnamachar " Visveswaraya Technological University"

Keywords:

Hybrid composites, electrical conductivity, Percolation threshold, Maxwell Wagnor,

Abstract

Abstract

This paper reports, electrical conductivity studies carried out on RT cure epoxy resin (LY556+HY951) containing three different particulate fillers graphite (Gr) a soft material, silicon carbide (SiC) a hard material and a hybrid graphite and silicon carbide (Gr-SiC). The weight fractions of three different fillers were varied from 10% to 40 wt% in steps of 10%. Increased filler fraction increases the electrical conductivity of epoxy composites for all the three types of fillers. The improvement in thermal conductivity for the epoxy hybrid composite containing 20% SiC, 20% Gr and 60% epoxy is 2.5 times higher than neat epoxy. Significant improvement in the electrical conductivity is observed for 40% filled epoxies. The experimental results were compared with analytical models such as Maxwell-Wagnor and also with Wideman-Franz law which relates thermal and electrical conductivity. The experimental thermal conductivity exhibits good correlation with analytical equations.

 

Keywords: Hybrid composites, electrical conductivity, percolation threshold, Maxwell Wagnor

Cite this Article

K. Srinivas, M.S. Bhagyashekar, B.G. Darshan. Effect of Fillers on Electrical Conductivity of Epoxy Composites. Journal of Polymer & Composites. 2018; 6(3): 25–30p.

Author Biography

  • Srinivas Krishnamachar, " Visveswaraya Technological University"
    Dr K.SRINIVAS ASSOCIATE PROFESSOR DEPT OF MECHANICAL ENGINEERING DON BOSCO INSTITUTE OF TECHNOLOGY BENGALURU 560074

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Published

2018-12-03

Issue

Vol. 6 No. 3 (2018)

Section

Articles

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