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Effect of Conductive Relaxation on Dielectric Relaxation in Poly (3hydroxy butyrate) PHB Semi-crystalline polymer.

By A. E. Kotp


The scope of this work is to analyze the dielectric data obtained for the Poly (3hydroxy butyrate) PHB semi-crystalline polymer material in the view of the electric modulus formalism in order to correlate the effect of the conductive relaxation processes on the dipolar relaxation processes. The results reveal that the conductive relaxation processes contribution in the low frequency region is much larger than in the high frequency region. Finally plot of the imaginary part of the complex electric modulus for a given temperatures as a function of the real part of the complex electric modulus (i.e, Argand’s plane) shows that the conductive processes are reflected by an arc at low frequency which agree with the model of Coelho. As a bacterially synthesized semi-crystalline polymer Poly (3-hydroxy butyrate) PHB has attached much research interests for its biodegradability and biocompatibility [1]. Dielectric spectroscopy (DS) is an important experimental technique to study the conformation and relaxation properties in polymers. Depending on the monome

Year: 2013
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