Dielectric studies of binary mixtures of Ethanol with 2-Methoxyethanol at microwave frequencies using time domain reflectometry technique

Abstract

The dielectric relaxation measurements on binary mixtures of 2-Methoxyethanol, with Ethanol have been carried out for different concentrations at 288 k, 298 k, 308 k, and 318 k using the time domain reflectometry (TDR) over the frequency range from 10 MHz to 20 GHz. The Kirkwood correlation factor and excess dielectric properties were determined and discussed to yield information on the molecular interaction of the systems. The relaxation time is increasing with increasing concentration of Ethanol. The Bruggeman plot shows a deviation from linearity. This deviation was attributed to some sort of molecular interaction which may take place between the 2-Methoxyethanol and Ethanol. The excess static permittivity and excess relaxation time values are negative for system indicating the solute-solvent interaction to exist between 2-methoxyethanol and Ethanol producing a field in such a way that the effective dipole rotation is hindered.