The relaxation of additives in polymer matrix

The dielectric properties of synthetic polyisoprene (IR 305) samples with additives of acetonitrile were studied by means of the thermally stimulated depolarization current (TSDC) method. Acetonitrile in concentration from 0.02 to 5 wt% was added to synthetic polyisoprene samples IR 305. The dielectric measurements of natural rubber (NR) before and after extraction and measurements of IR 305 with extract from NR were studied by means of TSDC method and by means of temperature dependence of loss factor at fixed frequency. The measurements were carried out in the temperature range −150°C to +130°C