Charging and discharging currents in polyvinylalcohol (PVA) polymer fi
lms were measured over the temperature range 30-150 degrees C and fiel
d strengths of (2.3-23)X10(6) V m(-1). Polymer films were prepared by
the isothermal immersion technique. The effect of field strength and c
harging temperature on the transient currents was studied. Activation
energies were evaluated from quasi steady state currents. A single rel
axation peak was observed both from isochronal currents and low-freque
ncy dielectric relaxation. Activation energies evaluated from both the
se methods are found to be in fairly good agreement. The polarization
has been considered to be due to space charge origin along with some c
ontribution from dipolar groups.