高校化学工程学报2017，Vol.31Issue(6)：1267-1275,9.DOI:10.3969/j.issn.1003-9015.2017.00.041
甲酰胺+乙醇/丙醇/异丙醇/乙酸乙酯二元混合物的体积及黏度性质
Volumetric and Viscous Properties for Binary Mixtures of Formamide and Ethanol/Propanol/Isopropanol/Ethyl Acetate
凌锦龙 1余成芸 1姜垚 1陆欣悦1
作者信息
- 1. 湖州师范学院 生命科学学院, 浙江 湖州 313000
- 折叠
摘要
Abstract
In order to study the excess properties and intermolecular interactions of formamide-containing binary solutions, the densities and viscosities of binary mixtures containing formamide (FA) and ethanol, propanol, isopropanol or ethyl acetate were determined at 293.15~318.15 K under atmospheric pressure. Excess molar volumes (VE) and viscosity deviations (△η) were calculated. Moreover, the viscosities of the binary mixtures were correlated and predicted with four semi-empirical equations. Thermodynamic functions of activation of the binary systems were calculated according to the absolute rate theory of Eyring. The results show that the excess molar volumes are negative in the temperature range studied for all binary mixtures, and the deviation increases when temperature increases. Viscosity deviations (△η) are negative for FA-ethanol and FA-ethyl acetate binary mixtures, and the deviation increases when temperature decreases. For the binary systems of FA-propanol and FA-isopropanol, viscosity deviations (△η) show an 'S' shape, and the deviation change from negative to positive in low FA concentrations, which increases when temperature decreases. The three-body McAllister model is the best correlation to represent the viscosities of all binary mixtures, and the average relative errors between predicted and experimental data were minimum. The results indicate that activation enthalpy plays a major role in mixing processes.关键词
超额摩尔体积/黏度偏差/黏滞性活化自由能/活化焓/活化熵Key words
excess molar volume/viscosity deviation/viscosity activation free energy/activation enthalpy/activation entropy分类
化学化工引用本文复制引用
凌锦龙,余成芸,姜垚,陆欣悦..甲酰胺+乙醇/丙醇/异丙醇/乙酸乙酯二元混合物的体积及黏度性质[J].高校化学工程学报,2017,31(6):1267-1275,9.
