Dielectric Relaxation Studies of Triethanolamine with 2-Alkoxyethanol using time Domain Reflectometry Technique

Abstract

Received: 22/Jan/2019, Accepted: 14/Feb/2019, Online: 28/Feb/2019 AbstractThe dielectric relaxation studies of Triethanolamine with 2-Alkoxyethanols binary liquid mixtures have been determined over the frequency range of 10 MHz to 20 GHz at different concentrations using Time Domain Reflectometer (TDR) Technique at 303.15K. The dielectric permittivity (ε') and dielectric loss (ε") has been plotted in the dielectric complex plane. The static dielectric constant (ε0), dielectric constant at high frequency (ε∞), and relaxation time (τ) values are calculated. Using these parameters, the values of Bruggeman factor (fB), excess dielectric constant (ε E ) and excess inverse relaxation time (1/τ) E were also calculated. The effective Kirkwood correlation factor (g eff ) and corrective Kirkwood correlation factor (gf) have also been determined and discussed to yield information on the structure and dynamics of the mixtures. The long range and short range interaction between the dipoles can be studied from the thermodynamic parameter, excess Helmholtz free energy (∆F E ). The free energy of activation for relaxation time (∆Fτ) were also calculated and interpreted on the basis of nature of molecular interaction.