Segmental dynamics in poly(vinylidene fluoride) studied by dielectric, mechanical and nuclear magnetic resonance spectroscopies

Abstract

The dynamics of segmental motions in semicrystalline poly(vinylidene fluoride) has been studied by means of dielectric and mechanical spectroscopies and nuclear magnetic resonance method. The relaxation data, obtained from different techniques, over a wide temperature and frequency range, have been analyzed in terms of main-chain segmental motion, described by phenomenological Havriliak- Negami function. The results indicate that the correlations between local conformational transitions in the amorphous phase are intermediate. Good agreement between the experimental and calculated data offers a contribution to the understanding of molecular dynamics in the glassy state of the polymer. © Springer-Verlag 2011.