DIELECTRIC ANALYSIS OF POLY(VINYL CHLORIDE) FILMS DOPED WITH COBALT(II) CHLORIDE

The dielectric behaviour of solution-grown thin films of poly(vinyl ch loride) containing cobalt(II) chloride as dopant was investigated with in the temperature range 20-120-degrees-C and a 1-100 kHz frequency ba nd. When correction was made for a conduction effect at low frequency, a high-temperature glass-transition relaxation process was observed i n addition to the ordinary glass-transition process of pure PVC. The f ormer was thus considered to be a cluster-ionic transition process whi ch might be due to a phase-separation behaviour. The effect of moistur e uptake by the doped films on the electrical properties is discussed.