Investigation on the dielectric relaxation properties of PVC with small amounts of additives. Thermally stimulated depolarization current analysis of PVC with lead stearate

Thermally stimulated depolarization current analysis enables investigations on the effect of additives of various types, introduced in small amounts during PVC processing, on the dielectric relaxation properties, physical transitions and structure. On the basis of the quantitative relationships established during this study, the problem concerning the mechanism of influence and distribution of the additives in the polymer matrix is discussed. It was found that lead stearate tends to act as an antiplasticizer at low concentrations.