Abstract: The ultrasonic speeds, u and viscosities, η of the binary mixtures of methyl acrylate with benzene, toluene, o-xylene, m-xylene, p-xylene, and mesitylene over the whole mole fraction range were measured at six different temperatures and at atmospheric pressure. From the experimental data, the excess isentropic compressibility, K_S^E, excess ultrasonic speed, u^E, excess molar isentropic compressibility, K_s,m^E, excess specific impedance, Z^Eand deviations in viscosity, Δηhave been calculated. The partial molar isentropic compressions, K_s,m,1 and K_s,m,2, and excess partial molar isentropic compressions, ${\mathop K\limits^{ - E}}$_s,m,1 and ${\mathop K\limits^{ - E}}$_s,m,2 over the whole composition range, partial molar isentropic compressions, and , and excess partial molar isentropic compressions, $\mathop K\limits^{ - \hat E} $_s,m,1 and $\mathop K\limits^{ - \hat E} $_s,m,2 of the components at infinite dilution have also been calculated. The results specified the existence of weak interactions between unlike molecules, and these interactions follow the order: benzene > toluene > p-xylene > m-xylene > o-xylene > mesitylene. The magnitude of interactions was found to be dependent on the number and position of the methyl groups in these aromatic hydrocarbons.

Key words: Ultrasonic speed, Viscosity, Methyl acrylate, Aromatic hydrocarbon, Excess properties, Intermolecular interactions

摘要： The ultrasonic speeds, u and viscosities, η of the binary mixtures of methyl acrylate with benzene, toluene, o-xylene, m-xylene, p-xylene, and mesitylene over the whole mole fraction range were measured at six different temperatures and at atmospheric pressure. From the experimental data, the excess isentropic compressibility, K_S^E, excess ultrasonic speed, u^E, excess molar isentropic compressibility, K_s,m^E, excess specific impedance, Z^Eand deviations in viscosity, Δηhave been calculated. The partial molar isentropic compressions, K_s,m,1 and K_s,m,2, and excess partial molar isentropic compressions, ${\mathop K\limits^{ - E}}$_s,m,1 and ${\mathop K\limits^{ - E}}$_s,m,2 over the whole composition range, partial molar isentropic compressions, and , and excess partial molar isentropic compressions, $\mathop K\limits^{ - \hat E} $_s,m,1 and $\mathop K\limits^{ - \hat E} $_s,m,2 of the components at infinite dilution have also been calculated. The results specified the existence of weak interactions between unlike molecules, and these interactions follow the order: benzene > toluene > p-xylene > m-xylene > o-xylene > mesitylene. The magnitude of interactions was found to be dependent on the number and position of the methyl groups in these aromatic hydrocarbons.

关键词: Ultrasonic speed, Viscosity, Methyl acrylate, Aromatic hydrocarbon, Excess properties, Intermolecular interactions