Dielectric Relaxation Study of Diethylene Glycol Monomethyl Ether with Aromatic Compounds Using Time Domain Reflectometry Technique

Abstract

Complex permittivity spectra e* = e'-je" of binary mixtures of diethylene glycol monomethyl ether with aromatic compounds were obtained in the frequency range of 10 MHz to 20 GHz at different temperatures 288, 298, 308 and 318 K using the time domain reflectometry technique. Dielectric parameters viz. dielectric constant (e₀), relaxation time (t) were obtained from complex permittivity spectra using nonlinear least squares fit method using these parameters excess permittivity (e₀^E), excess inverse relaxation time (1/t)^E, Bruggeman factor (f_B), Kirkwood correlation factor (g^eff) were determined. On the basis of above parameters, intermolecular interaction and dynamics of molecules at molecular level are predicated.