Densities and Viscosities for Correlative System of Dimethyl Carbonate at Different Temperatures
LI Nan-nan, MA Pei-sheng, JIN Hui-yi, YANG Chang-sheng (Key Laboratory for Green Chemical Technology of State Education Ministry, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China)
Densities and viscosities of the binary mixture of (dimethyl carbonate+methonal) at the temperatures interval (293.15~323.15K) and of (dimethyl carbonate+chlorobenzene) at the temperatures interval (293.15~ 343.15K) were determined under atmospheric pressure by using a vibrating U-shaped sample tube densimeter and Ubbelohde suspended-level viscometer. Density values gotten were used in the calculation of excess molar volumes and the gotten viscosities were used for the calculation of the viscosity deviations. For (DMC + methonal) system, the excess molar volumes and the deviations of viscosity are all negative and for (DMC+chlorobenzene) system, the excess molar volumes are positive and the diviations of viscosity are in the vicinity of zero. Excess molar volumes and deviations of viscosity were correlated with Redlich-Kister equation respectively. The standard deviations were lower than 5%. The resultes show these two systems can be regressed by using R-K equation.