The effect of liquid impregnants on solid polymeric dielectrics

The effect of high dielectric constant liquids such as propylene carbonate (PC) and ethylene carbonate (EC) on impregnable films, particularly polyvinylidene fluoride (PVDF), was investigated experimentally. The impregnation was achieved by soaking the film in polar liquids with or without vacuum. The dielectric constant and the dissipation factor of the film before and after impregnation were measured, and the dielectric strength of the film was tested under DC and AC conditions. Experimental results are presented and discussed