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| Article Name : | | | Comparative study of Dielectric behavior of binary mixtures of ethylene glycol with benzene and ethanol | | Author Name : | | | T.Beena, Ramya Rajan M.P., Dr.L.Sudha and G.Meenakshi | | Publisher : | | | Ashok Yakkaldevi | | Article Series No. : | | | GRT-580 | | Article URL : | |  | Author Profile View PDF In browser | | Abstract : | | | Dielectric relaxation and dipole moment of ethylene glycol (ROCH2CH2OH) with benzene and ethanol of different concentrations were studied at microwave frequency of 21.4 GHz at 300K. Different dielectric parameters like dielectric constant (ε ) and dielectric loss(ε” ) at microwave frequency, static dielectric constant (ε0) and optical dielectric constant (ε∞)of these molecules and their binary mixtures of different concentration were measured. The average relaxation time (τ0), relaxation time corresponding to overall molecular reorientation (τ1) and group rotations (τ2) were determined using Higasi's single frequency measurement. It has been observed that relaxation time is very closely related with molecular parameters such as size, shape and nature of the solute molecule. The excess inverse relaxation time was determined to confirm the existence of hydrogen bond in the binary mixtures in non polar solvent. The dipole moment of the binary mixtures was evaluated using Higasi's and Guggenheim's equations. The evaluated values of dipole moments and computed dipole moment values using a simple mixing equation of the polar molecules binary mixtures were used to explore the effect of non-polar solvent environment on molecular interactions between ethylene glycol with benzene and alcohol molecules. | | Keywords : | | |
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