Electric Modulus Analysis of Carbon Black/Copolymer Composite Materials

Mohamed El Hasnaoui, Manuel Pedro Fernanades Graça, Mohammed Essaid Achour, Luís Cadillon Costa

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DOI: 10.4236/msa.2011.210192                

Abstract

We have investigated the electrical properties of carbon black (CB) loaded in ethylene butylacrylate copolymer composite (EBA) in the frequency range between 10² and 10⁴ Hz and temperature range between 153 and 353 K. The frequency dependence of electrical data that have been analyzed in two frameworks: the electrical modulus formalism with the Kohlrausch-Williams-Watts stretched exponential function (KWW) and the electrical conductivity by using the Jonscher’s power law in the frequency domain. The stretching exponent β_KWW and n are found to be temperature independent for all CB fractions and to be decreased when the CB volume concentrations loaded in copolymer matrix increases. It is found that the activation energy obtained by the modulus method is in good agreement with that obtained by the DC conductivity in the power law which is independent on the CB contents that exist in the copolymer matrix, suggesting that these particles do not interact significantly with the chain segments of the macromolecules in the EBA copolymer.

Keywords

Electrical Modulus, Polymer Matrix, Nanocomposites, Conducting Particles

Conflicts of Interest

The authors declare no conflicts of interest.

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