Dielectric relaxation of para-hydroxy N-phenyl maleimide and its binary and ternary mixtures with methyl methacrylate, phenyl acetate and styrene in benzene solutions

Abstract

The dielectric absorption of P-hydroxy N-phenyl maleimide and its binary and ternary mixtures with methyl methacrylate, phenyl acetate and styrene in benzene solutions were studied in the microwave range (0.2–18 GHz). The dielectric loss data were analyzed into two Debye terms using a computer program based on Debye equation. The first region which is accurately defined as its absorption maximum lies in the available range of frequency and describes either the orientation of the molecule as a whole or the possibly complex which was expected to be formed or both. The second undetected region ascribes the inner mobility of the molecule. The values of the relaxation time of the investigated mixtures as a function of mole fraction show a deviation from linearity. This deviation was attributed to some sort of molecular interaction, which takes place between the investigated mixtures. The ratios between the experimental values of the relaxation time and those calculated from individual τi′s when the mole fraction was taken into account are considered to be a measure for such interaction.