Abstract
Dielectric relaxation behaviour in polar–polar mixtures of anisole and isopropyl alcohol in benzene has been observed using the measurements of dielectric permittivity and dielectric loss at microwave frequency at three different temperatures. Using the Higasi method, average relaxation time, relaxation time for intra-molecular rotation and inter-molecular rotation have been calculated for the mixtures at different compositions. Viscosity and density of the mixtures are obtained over the entire range of concentration and temperature studied. Thermodynamic parameters, such as enthalpy and entropy, have been calculated for all studied concentrations, i.e. pure liquids and their mixtures. Activation free energies due to dielectric relaxation and viscous mechanisms for the system are discussed.
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