Excess Molar Volumes and Viscosities of Binary Mixture of Diethyl Carbonate + Ethanol at Different Temperatures

摘要

The purpose of this work was to report excess molar volumes and dynamic viscosities of the binary mixture of the binary mixture carbonate ( DEC) + ethanol. Densities and viscosities of the binary mixture of DEC + ethanol at temperatures 293. 15 K-343. 15 K and atmospheric pressure were determined over the entire composition range. Densities of the binary mixture of DEC + ethanol were measured by using a vibrating. U-shaped sample tube densimeter. Viscosities were determined by using Ubbelohde suspended-level viscometer. Densities are accurate to 1.0 x 10~(-5) g centre dot cm~(-3), and viscosities are reproducible" within + - 0.003 mPa centre dot s. From these data, excess molar volumes and deviations in viscosity were calculated. Positive excess molar volumes and negative deviations in viscosity for DEC + ethanol system are due to the strong specific interactions. All excess molar volumes and deviations in viscosity fit to the Redlich-Kister polynomial equation. The fitting parameters were presented, and the average deviations and standard deviations were also calculated. The errors of correlation are very small. It proves that it is valuable for estimating densities and viscosities of the binary mixture by the correlated equation.