Computation of Dielectric Constants of N, N-Dymethylformamide with Propylene Glycol and Water at Different Temperatures

Abstract: Dielectric constants of binary mixtures of polar liquids have been evaluated at different concentrations and temperatures. The chemicals used were N, N-Dymethylformamide (DMF) as a solvent and Propylene Glycol (PLG), Water (H2O) as solutes. Excess dielectric constant, Kirkwood correlation factor and Bruggeman factor of the binary solutions has also been reported in the study. The measurements have been carried out using a wet sensor which is based on Frequency Domain Reflectometry (FDR) technique. The results show that the dielectric constant of the binary mixtures depends on the molecular size of the solute. The study also shows the DMF-PLG interaction is more favorable than that of DMF- H2O interaction.

Keywords: Dielectric constant; Polar liquids; Excess properties; N, N- Dymethylformamide; Propylene Glycol; Water.