PRESSURE EFFECT ON β RELAXATION PROCESS IN CHLORINATED POLYETHYLENE AND POLYVINYLACETATE
The β relaxation processes of chlorinated polyethylene vulcanizate (CPE) and polyvinylacetate(PVAc) were investigated by dielectricity in a frequency range of 30∼3×105 Hz, a temperature range of −50∼20 °C and a pressure range of 1∼600 Kg/cm2. Both superpositions on temperature and pressure were possible for CPE, but not for PVAc, and the behaviors of the activation volume ΔV≠ in CPE and PVAc were significantly different from each other.