乙酸乙酯-乙苯二元混合溶液的折射研究

计算混合溶液折射率的新方法:n=1 ∑wiρMDMi,对于无机混合溶液、乙醇水溶液和丙三醇水溶液等有着很好的适用性,但对含有羰基和苯环官能团复杂物质是否适用还不清楚.本文对含有羰基和苯环官能团的、不同浓度乙酸乙酯-乙苯溶液折射率进行计算,计算结果与实验测量值吻合的非常好,进一步证实了该方法对酯类、芳香族溶液的适用性,并给出了该溶液浓度、密度和折射率计算所需的重要参数值.这些结果也支持了该方法的理论基础,证明了该方法的电子云导体理论模型的合理性.还用Lorentz-Lorenz公式计算了这些混合溶液的折射率,并对2种计算方法的偏差进行了比较.

REFRACTOMETRIC STUDY ON BINARY SOLUTION OF ETHYL ACETATE-ETHYLBENZENE

The refractometric study on binary liquid systems is investigated.The relationship between concentration,density and refractive index is found,and the equation used for calculating the refractive index of binary liquid systems is also obtained.Ethyl acetate-ethylbenzene solutions are used to validate the equation at 298.15 K.The equations are tested with experimental data and a fine agreement between computed values and experimental values is obtained.The deviations for many sets of solutions are about 10~(-5),which is as small as the precision of the experimental apparatus.The refractive index of these solutions is also computed by Lorentz-Lorenz formula and compared with the experimental results.Finally,the important parameter of ethyl acetate-ethylbenzene solution that relates concentration,density and refractive index is given,which can be used for computing the refractive index or density of different concentration.