Short Circuit Depolarization Behaviour of PVDF and PVAc Blends

Depolarization current spectra of PVDF and PVAc has been studied as a function of polarizing field, polarizing temperature and film compositions. Blends samples of PVDF and PVAc with different weight percentage ::80,20; 90,10 and 85,15 were prepared by solvent Cast technique. The sample were bilaterally aluminized. TSDC currents on such bilaterally aluminized samples were recorded by reheating the sample at the rate of 3 degrees C per minute. Depolarization current were recorded by using Kheithely electrometer 610C. The various observed peaks in the thermograms are discussed on the basis of space charge polarization. The Activation energy is evaluated from the Garlick-Gibson plot of initial rise method.