화학공학소재연구정보센터
Journal of Chemical Thermodynamics, Vol.125, 71-85, 2018
Excess molar volumes and excess isentropic compressibilities of mixtures containing lactam, cyclic ethers and cyclic alkanones
Measurements of densities, rho, rho(123) and speeds of sound, u, u(123) of binary 1,3-dioxolane (1) + 1,4-dioxane (2) and ternary 1,3-dioxolane (1) + N-methylpyrrolidi-2-one or 1,4-dioxane (2) + cyclohexanone or cycloheptanone (3) mixtures have been carried out over the entire range of mole fraction at 293.15, 298.15, 303.15, 308.15 K and atmospheric pressure. The excess molar volumes, V-12(E), V-123(E) and excess isentropic compressiblities, (kappa(E)(S))(12), (kappa(E)(S))(123) have been determined from experimental data. The V-123(E) and (kappa(E)(S))(123) data for 1,3-dioxolane (1) + N-methylpyrrolidin-2-one (2) + cyclohexanone or cycloheptanone (3) and 1,3-dioxolane (1) + 1,4-dioxane (2) + cycloheptanone (3) mixture are negative over entire composition of (1) and (2). While V-123(E) for 1,3-dioxolane (1) + 1,4-dioxane (2) + cyclohexanone (3) are positive across full range of compositions of (1) and (2); the sign and magnitude of (kappa(E)(S))(123) values vary with change in composition of the constituent molecules. The V-12(E), V-123(E) and (kappa(E)(S))(12), (kappa(E)(S))(123) data have been fitted to RedlichKister equation to determine binary, ternary adjustable parameters and standard deviations. The V-123(E) and (kappa(E)(S))(123) data have been analyzed in terms of Graph Theory. It has been observed that Graph theory correctly predicts the sign as well as magnitude of V-123(E) and (kappa(E)(S))(123) data of the studied ternary mixtures. (C) 2018 Elsevier Ltd.