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Dielectric relaxation study of aqueous ethylene glycol mono-methyl ether(EGME)with water using time domain reflectometry technique in the frequency range 10MHz to 50 GHz

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Journal of Advanced Dielectrics 2020年第3期10卷 51-59页

作者： Zamir S.Khan M.P.Lokhande avadhut deshmukh A.C.Kumbharkhane Department of Physics Anjuman College of Engineering and Technology Sadar NagpurIndia Department of Physics&Electronics GVISH Amravati 444604India School of Physical Sciences Swami Ramanand Teerth Marathwada University Nanded India

The Complex permittivity spectra of glycol ether(GE)compounds such as ethylene glycol mono-methyl ether(EGME)with water mixture over entire concentration range and in temperature range of 10-25℃ have been determined using Time Domain Reflectometry(TDR)technique in the frequency range 10MHz to 50 *** complex permittivity spectra for EGME-water were fitted in the Cole-Davidson *** Static dielectric constant(ε_(0)^(E)),Relaxation time(τ),effective Kirkwood correlation factor(g_(eff)),excess permittivity(ε_(0)),thermodynamic parameters(activation enthalpy and activation entropy)and Bruggeman factor(f_(B))have been calculated by the nonlinear least square fit *** intermolecular interactions between EGME-water binary mixtures suggest the nonlinear behavior of dielectric *** contribution of hydrogen bonding interactions among the solute-solvent mixtures is confirmed by Excess properties and Bruggeman factor.

关键词： Ethylene glycol mono-methyl ether complex permittivity Kirkwood correlation factor excess dielectric properties thermodynamic parameters Bruggeman factor

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Dielectric spectroscopy and hydrogen bonding studies of 1-chloropropane-ethanol mixture using TDR technique

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Journal of Advanced Dielectrics 2019年第2期9卷 50-55页

作者： Ravindra V.Shinde avadhut R.deshmukh Shital A.Ingole Ashok C.Kumbharkhane College of Agriculture Engineering and Technology Vasantrao Naik Marathwada Krishi Vidyapeeth Basmat Road Parbhani 431402 MaharashtraIndia School of Physical Sciences Swami Ramanand Teerth Marathwada University Vishnupuri Nanded 431606MaharashtraIndia

The time-domain reflectometry technique was exercised to assess the complex permittivities of 1-chloropropane and ethanol along with their binary mixture in the frequency range of 10MHz–50 GHz and in the temperature range of 10–25℃.Dielectric parameters like static dielectric permittivity(ε_(0))and relaxation time(τ)have been acquired by the least-square-fit *** obtained assessments of static permittivity and relaxation time were used to compute various dielectric parameters like excess dielectric constant,excess relaxation time,Kirkwood correlation factor and thermodynamic *** experimental outcome illustrates the nonlinear variations in dielectric permittivity,relaxation time and authenticates the structural formation due to intermolecular interaction between 1-chloropropane and *** rotary motion and dipole reorientation movements of these complex systems are presented in agreement with the molar entropy and enthalpy.

关键词： Time-domain reflectometry complex permittivity dielectric relaxation thermodynamic parameter Kirkwood factor.

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