Excess thermodynamic properties of ternary liquid mixtures of xylenes with butyl acrylate and methyl methacrylate solvents at 303, 308 and 313 K

Department of Physics, Directorate of Distance Education, Annamalai University, Annamalainagar-608 002,
Tamilnadu, India
E-mail : palani_physics06@yahoo.co.in
Department of Physics, FEAT, Annamalai University, Annamalainagar-608 002, Tamilnadu, India
Manuscript received 19 February 2010. revised 31 May 2010, accepted 15 June 2010

Ultrasonic velocity (U), density (ρ) and viscosity (η) for the ternary liquid mixtures of butyl acrylate + methyl methacrylate + o-xylene, m-xylene and p-xylene have been measured as a function of the composition at 303, 308 and 313 K. The experimental data have been used to calculate some excess thermodynamical parameters, such as viscosity (Ƞ^E), adiabatic compressibility (β^E), free volume (V_f^E), Gibb's free energy (ΔG^E) and Grunberg's interaction parameter (d). These excess magnitudes are discussed qualitatively in terms of the nature and type of intermolecular interactions of the components involved.