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Dielectric and Electric Modulus of Poly(3-hydroxybutyrate) Semi-crystalline Polymer

International Journal of Polymeric Materials , Volume 57 (12): 1075-1082 – Dec 1, 2008


Taylor & Francis
© 2009 Informa plc
conductive processes
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Dielectric and Electric Modulus of Poly(3-hydroxybutyrate) Semi-crystalline Polymer


We present results of dielectric investigation of poly(3-hydroxybutyrate) (PHB) semi-crystalline polymer. The data obtained are treated in the view of electric modulus formalisms in order to correlate the effects of the conductivity on the net dielectric relaxation phenomena. The results reveal that the conductive relaxation processes contribution in the low frequency region is much larger than in the high frequency region. At high temperatures (above the glass transition temperature), the electrical properties are strongly influenced by the space charge. Finally the plot of the complex electric modulus for a given temperature in Argand's plane shows that the conductive processes are reflected by an arc at low frequency which agrees with the model of Coelho.
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