乙酸乙酯-异丙醇混合液的密度和折光率

Densities and refractive indices of ethyl acetate-isopropanol binary mixture

常压下测定了乙酸乙酯-异丙醇二元混合液在293.15—318.15 K下的密度和折光率,建立了该二元混合液密度与组成和温度关系的计算方程。计算了过量摩尔体积、折光率偏差,分别用Redlich-Kister方程进行了关联。过量摩尔体积在全摩尔分数范围内为正值,而折光率偏差为负值,且均随温度升高而偏差增大。利用Lorentz-Lorenz关系式计算了二元体系的摩尔折光率和摩尔折光率偏差,偏差亦随温度升高而增大。

The density and refractive index of ethyl acetate-isopropanol mixture were measured at 293.15-318.15 K and atmospheric pressure.The data of density and refractive index were used to calculate the excess molar volumes and refractive index deviations,and correlated by Redlich-Kister equation respectively.The result shows that the excess molar volumes are positive and the refractive index deviations are negative over the whole mole fraction range,and both of deviations increase with temperature rise.The density data are fitted as a function of composition and temperature.The molar refractive index and its deviation of the binary system were calculated by Lorentz-Lorenz equation.The deviation increases with temperature rise.