Dielectric Behaviour of Binary Mixture of 2-Chloroaniline with 2-Methoxyethanol and 2-Ethoxyethanol

Abstract

Densities, viscosities, refractive indices, dielectric constant (ε') and dielectric loss (ε'') of 2-chloroaniline (2CA) + 2-methoxyethanol (2ME) and 2-chloroaniline (2CA) + 2-ethoxyethanol (2EE) for different mole fractions of 2-chloroaniline in binary mixture have been measured at single microwave frequency 10.985 GHz at 30⁰C by Surber method using microwave X-band. The values of dielectric parameters (ε' and ε'' )  have been used to evaluate the molar polarization (P₁₂) loss tangent (tanδ)^, viscosity (η), activation energy (Ea), excess permittivity (Δε'), excess dielectric loss (Δε''), excess viscosities (Δη), excess polarization (ΔP₁₂) and excess activation energy (ΔE_a)  have also been estimated. These parameters have been used to explain the formation of complexes in the system. It is found that dielectric constant (ε'), dielectric loss (ε''), loss tangent (tanδ), molar polarization (P₁₂) varies non-linearly but activation energy (Ea) , viscosity (η) ,density (ρ), and refractive index (n) varies linearly with increasing mole fraction in binary mixture of 2-chloroaniline (2-CA) + 2-methoxyethanol (2-ME) and 2-chloroaniline (2-CA) + 2-ethoxyethanol (2-EE). Hence, solute-solvent molecular associations have been reported.