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Molecular interaction studies of isopropyl acetate-xylene mixture using dielectric relaxation approach

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Title Molecular interaction studies of isopropyl acetate-xylene mixture using dielectric relaxation approach
 
Creator Birajdar, S S
Deshmukh, A R
Suryawanshi, D B
Kumbharkhane, A C
 
Subject Time domain reflectometry (TDR)
Dielectric permittivity
Relaxation time
Kirkwood correlation factor
Thermodynamic parameters
 
Description 72-79
Dielectric relaxation parameters of Isopropyl acetate (IPA)-xylene mixtures with different concentrations and temperatures have been measured in the frequency range of 10 MHz to 30 GHz using time domain reflectometry technique. Static dielectric constant, relaxation time, excess permittivity, excess relaxation time, Bruggeman factor, Kirkwood correlation factor and thermodynamic parameters have been determined to understand molecular association between the IPA and xylene molecules. For entire concentrations of IPA-xylene mixture the Kirkwood correlation factor is less than one which shows the antiparallel nature of electric dipole orientation. The experimental values of dielectric constant obtained from time domain reflectometry are in well agreement with theoretical values of dielectric constant obtained by Luzar model. Positive values of enthalpy and entropy indicating that the system is endothermic and less ordered while Gibbs free energy decreases with increase of IPA in xylene.
 
Date 2021-01-12T08:37:49Z
2021-01-12T08:37:49Z
2021-01
 
Type Article
 
Identifier 0975-0975(Online); 0376-4710(Print)
http://nopr.niscair.res.in/handle/123456789/55935
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJC-A Vol.60A(01) [January 2021]