Temperature dependent dielectric relaxation study of Tetrahydrofuran in Methanol and Ethanol at microwave frequency using Time Domain Technique.

Dielectric relaxation study of tetrahydrofuran (THF) has been carried out in methanol and ethanol at different temperatures. Time domain Reflectometry (TDR) in reflection mode has been used to measure reflection coefficient in frequency range of 10 MHz to 10 GHz. Further, Fourier transform and least squares fit methods have been used to obtain dielectric parameters such as dielectric constant and relaxation time. The excess dielectric parameters and thermodynamic parameters have also been obtained for die system. The investigation shows the systematic change in dielectric parameters of the system with change in concentration and temperature. (C) 1999 Elsevier Science B.V. All rights reserved.