Dielectric relaxation in ternary systems of alcohols and nitriles in benzene at microwave frequency

The permittivity and the dielectric loss of ternary mixtures of equimolar concentrations of m-cresol, o-cresol with acetonitrile, acrylonitrile and benzonitrile in benzene have been measured at 8.33 GHz and 308 K. The distribution parameter α, the most probable relaxation time τ, the relaxation time...

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Bibliographic Details
Published in:Philosophical magazine letters 2008-12, Vol.88 (12), p.889-895
Main Authors: Subramanian, M., Thenappan, T., Parthipan, G.
Format: Article
Language:English
Subjects:
activation free energy
Condensed matter: electronic structure, electrical, magnetic, and optical properties
dielectric loss
Dielectric loss and relaxation
Dielectric properties of solids and liquids
Dielectrics, piezoelectrics, and ferroelectrics and their properties
Exact sciences and technology
permittivity
Permittivity (dielectric function)
Physics
rate processes
relaxation
viscosity
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Summary:The permittivity and the dielectric loss of ternary mixtures of equimolar concentrations of m-cresol, o-cresol with acetonitrile, acrylonitrile and benzonitrile in benzene have been measured at 8.33 GHz and 308 K. The distribution parameter α, the most probable relaxation time τ, the relaxation time for overall rotation of the molecule τ(1), the relaxation time for group rotation τ(2), and the excess dipole moment for various systems have been calculated by the Cole-Cole and Higasi methods. Data has been analyzed in terms of two-relaxation processes: overall rotation and group rotation.
ISSN:0950-0839
1362-3036
DOI:10.1080/09500830802498986