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Title: Influence of solvent environment on dielectric behaviour of ethylene oxide condensation products
Authors: Sengwa, R J
Kaur, Kulvinder
Issue Date: Dec-1999
Publisher: NISCAIR-CSIR, India
Abstract: Dielectric behaviour of four series of ethylene oxide condensation products, i.e. monoalkyl ethers of ethylene glycol, monoalkyl ethers of diethylene glycol, dialkyl ethers of ethylene glycol and dialkyl ethers of diethylene glycol have been carried out in dilute solutions of carbon tetrachloride at 35ºC. Molar polarization and Kirkwood correlation factor have been determined for the molecules of these series as a function of mole fraction of solute using 1 MHz static dielectric constant and dielectric constant at optical frequency. It is inferred that the extensive inter and intra molecular hydrogen bonding exists in the molecules of monoalkyl ethers of ethylene glycol and of diethylene glycol in dilute solutions of carbon tetrachloride. Average relaxation time, relaxation time corresponding to overall rotation and group rotations have been calculated by measuring the complex permittivity in dilute solutions of carbon tetrachloride at 9.83 GHz. A comparison has been made with the dielectric relaxation processes of these molecules in dilute solutions of benzene and in their pure liquid state which were carried out earlier in this laboratory. The influence of hydrogen bonding, the effect of chain length and solvents environment on these relaxation times has been discussed. A distinction between the various relaxation times of different homologous series have been clearly made out.
Page(s): 899-905
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Appears in Collections:IJPAP Vol.37(12) [December 1999]

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