Dielectric relaxation studies of ternary liquid mixtures of aniline and substituted anilines with acrylonitrile in the microwave region

Abstract

Dielectric behaviour of three amines and their mixtures: <i>N</i>-methyl aniline + acrylonitrile, aniline + acrylonitrile and <i>N,N</i>-dimethyl aniline + acrylonitrile at microwave frequency 9.36 GHz has been studied at temperature 303 K. Different dielectric quantities like dielectric constant (e'), dielectric loss (e"), static dielectric constant (e_o), and dielectric constant at optical frequency (e_∞) have been determined. The relaxation time (τ) has been calculated by both Higasi’s method and Cole-Cole method. The molar free energy of activation (Δ<i style="">F</i>_{<img src='/image/spc_char/tow.gif'>}) and (Δ<i style="">F</i>_η) have also been calculated. The complex systems studied show the maximum relaxation time values at 1:1 complex ratio by both Higasi’s method and Cole-Cole plot method.