Macroscopic viscosity and dielectric relaxation process of ethyl and butyl acetates.

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概要

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• Dielectric constants and losses have been measured at 9.8 GHz microwave frequency for ethyl and butyl acetates in benzene and benzene–paraffin oil mixtures at 18 °C. The data obtained has been analysed in terms of the two relaxation times τ<SUB>(1)</SUB> and τ<SUB>2</SUB> using Higasi, Koga, and Nakamura method and their dependence on the viscosity has been examined. Since the observed values of τ<SUB>(1)</SUB>and τ<SUB>(2)</SUB> are significantly different, the systems studied represent two Debye type dispersions. It has been found that the relaxation behaviour giving rise to τ<SUB>(1)</SUB> in both the ester molecules is not effected to any appreciable extent by the increased macroscopic viscosity. The dielectric relaxation time τ<SUB>(2)</SUB> associated with the molecular process lengthens with the increasing macroscopic viscosity of the medium.

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著者

• Saxena Mahesh

  Department of Physics, Lucknow University

• Saxena Sudhir

  Department of Physics, Lucknow University

• Shukla Jagdish

  Department of Physics, Lucknow University

関連論文

• Macroscopic viscosity and dielectric relaxation process of ethyl and butyl acetates.

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