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Dielectric Behavior in an Oriented β-PVDF Film and Chain Reorientation Upon Transverse Mechanical Deformation
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2002
Year
EngineeringMechanical EngineeringSoft MatterSemicrystalline PolyVinylidene FluoridePolymer MaterialMechanicsPolymer PhysicPolymer ChemistryBiophysicsMaterials ScienceSolid Mechanicsβ-Pvdf FilmPolymer AnalysisPolymer ScienceApplied PhysicsG -PvdfPolymer PropertyDielectric BehaviorMechanics Of Materials
Films of semicrystalline poly(vinylidene fluoride) (PVDF) in the g -phase have been studied by means of dielectric measurements and Fourier Transform Infrared Spectroscopy (FTIR). The main goal of the study was to compare the dielectric relaxations of f - and g -PVDF and to improve the understanding of the structural changes that occur in g -PVDF during a mechanical deformation process and their impact in the electromechanical properties of the polymer. A reorientation of the chains and a decrease in the degree of crystallinity with increasing deformation was observed.