DIELECTRIC RELAXATION STUDY OF MIXTURES OF METHANOL AND DIMETHYLAMINOETHANOL USING TIME DOMAIN REFLECTOMETRY

Dielectric relaxation measurements on Methanol – Dimethylaminoethanol solvent mixtures have been carried out across the entire concentration range using Time Domain Reflectometry technique at 15, 25, 35 and 45 0 C over the frequency range from 10 MHz to 20 GHz. The mixtures exhibit a principle dispersion of the Davidson-Cole relaxation type at microwave frequencies. The Bilinear calibration method is used to obtain complex permittivity e * (ω) from complex reflection coefficient ρ * (ω) over the frequency range 10 MHz to 10 GHz. The excess permittivity (e E ), excess inverse relaxation time (1/τ) E , Kirkwood correlation factor (g eff ) and thermodynamic parameters