Dielectric Behaviour of Binary Polar Liquid Mixtures in Dilute Solutions of Benzene at Microwave Frequency†

Abstract

Dielectric relaxation behaviour of two binary systems, viz., 2-
aminopropane + nitrobenzene and 2-ethoxyethanol + pyridine in dilute
solutions of benzene have been studied at 9.54 GHz and at
room temperature. A concentration variation method of Gopala
Krishna is used to determine the experimental relaxation time (τ)
of the systems. A theoretical treatment of Madan is used to determine
(τ) values. A theoretical relation for determining (τ) values
for non associated behaviour of binary mixture is also proposed.
The results are interpreted in terms of intermolecular interactions
of the relaxing griups in the mixture. The (τ) values determined
from the proposed theoretical equation are consistant with the values
determined from the Maddan's relation.