The dynamic and dielectric relaxations of of maleic anhydride grafted polypropylene (PPgMA) and its clay filled nanocomposites with different degree of clay exfoliation have been investigated. Fully and partially exfoliated samples were prepared through powered sonication and melt blend, respectively. Our results indicated that both mechanical α and β relaxations can be identified with dynamic mechnaical analysis. Only a single relaxation process due to interfacial polarization was observed in broadband dielectric measurements. Dielectric dispersion parameters, including dielectric strength and peak relaxation frequency, were identified and appeared sensitive to the degree of clay exfoliation.
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Technical Papers, Regional Technical Conference - Society of Plastics Engineers 3 , pp. 1875-1879
