Abstract

Piezoelectric polymer PVDF poly (vinyledene fluoride) films play an important role in sensor and actuator
applications. PVDF exists in four different phases
, β, γ and
, out of which β-phase is most suitable for
piezoelectric applications. The present work concerns the development of
-PVDF films, which are then
converted to β-phase by appropriate thermo-mechanical treatment. The films are characterized for structural
and surface morphological studies to investigate the presence of β-phase through X-ray diffraction, and
scanning electron microscopy. These films are electroded and poled to align the dipoles and acquire
piezoelectric properties.
Being dielectric material, dielectric properties of PVDF has been studied in detail. As PVDF is flexible, light
weight, chemically inert, tough and creep resistant, it has added advantages to put on curved surfaces. In the
present study, various parameters of PVDF such as Permittivity, Tan
, Capacity (pF), Impedance (Ω), Modulus,
Conductivity(S/cm), Specific Resistance (Ωcm) are obtained using dielectric spectrometry. Results are well
match with literature value. These properties are useful for super capacitor applications.