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Title: Microwave absorption and relaxation processes of ternary mixtures of non-rigid polar liquids
Authors: Rewar, G D
Bhatnagar, D
Issue Date: Nov-2001
Publisher: NISCAIR-CSIR, India
Abstract: The dielectric absorption of three acrylates and their mixture compositions as liquid dielectric samples have been studied at MW frequency 9.132 GHz in dilute solution of carbon tetrachloride in the temperature range 300-330 K. Different dielectric parameters like dielectric constant ɛ′ and dielectric loss ɛ′′ at microwave frequency, dielectric constant ɛδ at static frequency and dielectric constant ɛ at optical frequency have been determined. Using these dielectric data, distribution parameter α, various relaxation times, viz. 0, 1, and 2 of individual components and their ternary mixture compositions have been calculated. Thermo dynamical parameters like molar energy of activation ΔFɛ molar enthalpy of activation ΔHɛ and molar entropy of activation ΔSɛ have been evaluated by considering the relaxation as the rate process. Variation of In (2T) versus 1/T indicates exponential decay of relaxation time with temperature for dielectric relaxation process. The relaxation time values for single component solutions agree well with literature values while relaxation times of ternary mixture compositions are consistent with the computed values obtained from various theoretical relations.
Page(s): 707-713
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Appears in Collections:IJPAP Vol.39(11) [November 2001]

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