CHARGING AND DISCHARGING CURRENTS IN POLY(VINYL PYRROLIDONE) POLYMER THIN-FILMS

Poly(vinyl pyrrolidone) (PVP) polymer films were prepared by the isoth ermal immersion technique. Transient currents (charging and dischargin g currents) in PVP thin films were measured in the temperature range 3 0-150 degrees C and field strengths of 2.3 X 10(6) - 23 X 10(6) V m(-1 ). Activation energies were evaluated from quasi steady-state currents . The single relaxation peaks were observed from isochronal currents a nd low frequency dielectric relaxation. The activation energies were e valuated from both these methods and are almost similar. The polarizat ion was attributed to dipolar mechanism.