SIMULATION ANALYSIS OF THE DIELECTRIC POLARIZATION IN LIQUID SILICONE RUBBER

Abstract

In this paper, the dielectric behavior of an unprocessed Liquid Silicone Rubber (LSR) sample has been

investigated via the approximation of intermittent Polarization and Depolarization Current (PDC)

measurements based on Debye’s theory. The extended Debye models are compared with regard to

the number of required relaxation branches as well as their time constants. It was found that the

depolarization of LSR could be modeled predominantly by five distinct Debye models, while the

polarization was reconstructed by a span of four to eight, indicating a comparatively high dispersion.

The time constants (TC) of these components change in a convergent manner with progressing

measurement cycles, which are analyzed in terms of their correspondence to the individual

constituents of LSR. Furthermore, it was observed that the polarization current is reduced with

increasing number of measurements, which was ascribed to the presence of an additional Debye

relaxation, that was not captured due to the relatively short time period of the measurement cycles. A

contrast thereof to an analytical description was also presented as a further verification.