BuNENA/DMSO二元体系密度、黏度测定及关联

利用密度瓶和乌氏黏度计分别测定了25,40,50,70℃时BuNENA/DMSO二元体系的密度、黏度,并对黏度与温度、组成的关系进行了多项式回归,模型计算值平均相对误差在0.17%—1.53%。由密度数据计算出超额摩尔体积VmE,由黏度数据计算出不同温度、组成下的超额黏度Δη,其中VEm为正值,Δη为负值。对混合液在不同温度下的VmE与组成的关系用Redlich-Kister方程进行了关联,平均相对误差小于3%。

Determination and correlation of densities and viscosities of binary mixture BuNENA/DMSO

The densities and viscosities of binary liquid mixture BuNENA with DMSO were measured at 25,40,50,70 ℃ by using pycnometer and Ubbelohde-type capillary viscometer.The experimental data of viscosities,temperature,and composition were fitted to theoretical relations.The average relative error of simulation data is between 0.17% and 1.53%.The excess molar volumes VEm and viscosity deviations Δη were calculated by density and viscosity data with different temperatures and composition data,respectively.The VEm is positive while the Δη is negative.These results were correlated to Redlich-Kister polynomial.The average relative error of simulation data is lower than 3%.