Effects of Annealing Temperature and Solvent Dipole Moment on the Formation of β -Phase of PVDF
Keywords:
PVDF, Polarization, dielectric, permittivity, thinfilmsAbstract
PVDF polymer is known for its lightweight, superior mechanical qualities, resistance to chemicals and electricity, and processability. PVDF-based energy harvesting systems can withstand greater vibration due to their excellent chain flexibility. This study aims to create thin films with high β phase content using DMSO, an organic solvent with a higher polarity index and dipole moment than DMF. Raman and FTIR spectroscopy are used to measure the material and describe dielectric characteristics at different temperatures and frequencies. The study aims to optimize the annealing temperature to achieve the maximum β-phase content, which was found to be 100°C. Polarization-Electric field (P-E) curves are characterized using a Sawyer-Tower circuit, determining key ferroelectric parameters like remnant polarization and saturation polarization. The study found that the remnant polarization value was maximum for the sample with the maximum β content (annealed at 100°C)
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