Conductivity relaxation spectra of interpenetrating network conducting composites of polypyrrole (PPy) and poly(styrene-co-butyl acrylate) (SBA) have been analysed on the basis of coupling model developed by Ngai. The macroscopic activation energy obtained from coupling model using the stretch exponent β compares favourably with the tunnel energy estimated from the overlapping large polaron tunnelling (OLPT) model.
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Bhattacharyya et al. (2000) studied this question.
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