Dielectric dispersion studies of some unsaturated compounds in dilute solutions

Abstract

The dielectric permittivity and dielectric loss of solutions of four unsaturated triple-bonded compounds were measured as a function of frequency (10 kHz, 8.43, 11.3 and 35.6 GHz), temperature (33–70 °C) and concentration (0.07–0.01 weight fraction). The data are analysed in terms of a double relaxation process. The most probable relaxation time, the overall molecular relaxation time and the group relaxation time were calculated. The dipole moments were also calculated along with the thermodynamic parameters. The results are discussed in terms of association effects in these compounds and the dielectric data are correlated with the infrared spectral data.