Poling behavior of polyvinylidene fluoride at room temperature

Abstract

The electrical polarization distribution for biaxially oriented polyvinylidene fluoride poled at room temperature was measured by means of the thermal pulse experiment. The evolution of the distribution as a function of poling field and poling time was studied. The resolution was one-tenth the sample thickness. In addition, the sample poled to the highest field was reverse poled to successively higher fields to study the effects of field reversal. The film was found to pole easiest in the middle regions implying a higher coercive field near the surfaces.