Dielectric relaxation processes of some almost spherical dipolar organic molecules

Abstract

Dielectric constant and loss measurements have been made, between 10 and 105 Hz, on seven dipolar substituted methanes from liquid nitrogen temperature up to and above the melting point. All these components have been examined in the pure solid state, four in cis-decalin and one in carbon tetrachloride. Two detailed studies have been made on the influence of concentration on the loss factor maximum value. All of the substances gave broad loss curves which were analysed to give relaxation times and activation enthalpies. Six compounds yielded an α process in the pure solid state. In the case of 1, 1, 1-trichloroethane in the pure solid state, cis-decalin, and carbon tetrachloride the β process may probably be ascribed to molecular relaxation.