碳酸二乙酯甲苯二元体系黏度密度的测定及关联

Determination and Correlation of Densities and Viscosities for Binary Mixture of Diethyl Carbonate with Toulene

在常压下采用U形振动管密度计测定了碳酸二乙酯甲苯二元体系在298.15～363.15K下的相对密度,用乌氏黏度计测定了该混合物在298.15～363.15K下的黏度,并由密度数据计算出超额体积VE及混合黏度的变化Δη,同时对不同温度下的超额体积和混合黏度的变化与组成的关系按RedlichKiste方程进行了关联,给出了回归系数和标准误差。并用分子之间的作用力解释了混合物的超额体积和混合黏度的变化随组成的变化情况。

The densities and viscosities of the binary mixture of diethyl carbonate with toulene were determined between 293. 15 K and 363. 15 K under atmospheric pressure by using a vibrating Ushaped sample tube densimeter and Ubbelohde suspended-level viscometer respectively. Density values were used in determination of excess molar volume. Viscosity values were used to calculated deviations of viscosity. The excess molar volumes, VE and viscosity deviations, △ηwere fitted to a Redlich-Kister equation and the regression coefficients and standard deviations values were given. The results were discussed in terms of intermolecular interactions.