Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

ABSTRACT

Densities () and viscosities () of ternary system n-dodecane + bicyclohexyl + n-butanol, and three corresponding binary systems, n-dodecane + bicyclohexyl, n-dodecane + n-butanol, bicyclohexyl + n-butanol, have been measured at temperature range from 293.15 K to 333.15 K in detail. Densities are obtained by using a vibrating-tube densimeter. Viscosities are determined by an automatic microviscometer based on the rolling ball principle. The excess molar volumes (VmE ) and the viscosity deviations () of each mixture have been calculated with the measured data. The VmE and of three binary systems have been fitted to the RedlichKister equation, and those of the ternary system have been fitted to Nagata-Tamura, Singh, Clibuka, and Redlich-Kister semiempirical equations respectively. The VmE values are negative for the binary system of n-dodecane + bicyclohexyl with the minimum at about x = 0.5, while those of binary system n-dodecane + n-butanol, bicyclohexyl + n-butanol are positive over the entire concentration range. For the ternary system, the VmE values are subtotal positive and the are negative over the entire concentration range. The nonideal behaviors of the mixtures are explained by physical interactions and structural effects between mixture components.