INVESTIGATING THE EFFECT OF AN ALTERNATING ELECTRIC FIELD ON DIFFERENT PROPERTIES OF THERMOPLASTIC POLYMERIC COMPOSITES

Abstract

In this paper we have studied the effect of adding zinc oxide (ZnO) in its micro size on the
dielectric parameters of polyvinyl chloride (PVC), such as dielectric permittivity and dielectric
loss factor, as they are very important parameters characterizing the dielectric materials. Using
Broad Band Dielectric Spectrometer (BDS) in the frequency range (0.1Hz – 107 Hz), we have
measured both dielectric constant (ɛ′) and dielectric loss (ɛ″) of PVC composites containing
different contents of zinc oxide (5%, 7%, 9% and 11%) by weight of polymer. We have found
that ɛ′ of PVC sample with (5%) ZnO is higher than that of Pure PVC one, and then a decrease
in the dielectric constant (ɛ′) for the rest of concentrations is observed. Meanwhile, dielectric
loss (ɛ″) increases over the frequency range for all composites comparing to pure PVC.