ON THE LOW-FREQUENCY DIELECTRIC BEHAVIOR OF CARBOXYMETHYL CELLULOSE AND ITS SODIUM-SALT

A dielectric dispersion and frequency loss peak within the low frequen cy range 0-05-1 kc/s and at temperatures of 283-333 K was observed in the caw of the sodium salt of carboxymethyl cellulose and absent in th e case of its acid form. The critical frequency of the dielectric abso rption was independent of molecular weight and of the presence of low moisture content. The results obtained show that the variation with te mperature of the dielectric constant is exponential at low frequency o nly in the case of the sodium salt of carboxymethyl cellulose. The sig nificance of the results is discussed.