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Electrical t ransport properties of CB epoxy polymer composites

M. EL HASNAOUI1,* , J. BELATTAR1, M. E. ACHOUR1, L. C. COSTA2, F. LAHJOMRI3

Affiliation

  1. LASTID Laboratory, Faculty of Science, Ibn Tofail University, B.P:133, 14000 Kenitra, Morocco
  2. I3N and Physics Department, University of Aveiro, 3810-193 Aveiro, Portugal
  3. Ecole Nationale des Sciences Appliquées de Tanger (ENSAT) B.P. 1818, Tanger Principale, Morocco

Abstract

Conductivity measurements were made on carbon black/epoxy-resin composites over the temperature range from 22 to 70 °C (Tg ≈83 °C) and for volume fractions of carbon black from 0.1 to 3.0%. The temperature effects on the electricall conductivity of these heterogeneous materials are analysed by Mott’s variable range hopping model, in order to understand their conduction transport mechanism. Using this model we were able to calculate meaningful values for the density of states, hopping distance and hopping energy. The calculated Mott’s parameters of epoxy-resin doped with carbon black were found to be consistent with the Mott’s requirement. The effect of the addition of carbon black particles was to reduce the density of states near the Fermi level..

Keywords

DC conductivity, Mott’s parameters, Transport properties, Composites, Density of states, Glass transition.

Citation

M. EL HASNAOUI, J. BELATTAR, M. E. ACHOUR, L. C. COSTA, F. LAHJOMRI, Electrical t ransport properties of CB epoxy polymer composites, Optoelectronics and Advanced Materials - Rapid Communications, 6, 5-6, May-June 2012, pp.610-613 (2012).

Submitted at: Feb. 28, 2012

Accepted at: June 6, 2012