高校化学工程学报2016，Vol.30Issue(2)：268-275,8.DOI:10.3969/j.issn.1003-9015.2016.02.003
1,2-丙二醇+丁醇/戊醇/己醇二元系的过量体积和黏度
Excess Molar Volumes and Viscosities of Binary Mixtures Composed of 1,2-Propanediol with Butanol, Pentanol or Hexanol
凌锦龙 1李灵 1杨佳琳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
The densities and viscosities of binary mixtures consisting of butanol, pentanol or hexanol with 1,2-propanediol(12PD) were measured using pycnometer and Ubbelohde viscometer at 293.15~318.15 K under atmospheric pressure. The density and viscosity data of the binary mixtures were fitted as functions of composition and temperature. Excess molar volumes (VE), viscosity deviations (∆η) and excess Gibbs energy of activation of viscous flow (∆G*E) were calculated from the experimental data. The results show that the excess molar volumes are positive over the whole mole fraction range in the temperature range studied for all of the binary mixtures, and the deviation increases as temperature increases. However, the largest deviation varies in different solution compositions. The excess molar volume value increases following an order of butanol - pentanol – hexanol. Both∆η and∆G*E are negative over the whole mole fraction range in the temperature range studied for all of the binary mixtures, and the deviation increases as temperature decreases. All of the excess properties are correlated by the Redlich-Kister equation and the molecular interactions are analyzed.关键词
密度/黏度/过量体积/黏度偏差/过量流动活化自由能Key words
density/viscosity/excess molar volume/viscosity deviation/excess Gibbs energy of分类
化学化工引用本文复制引用
凌锦龙,李灵,杨佳琳..1,2-丙二醇+丁醇/戊醇/己醇二元系的过量体积和黏度[J].高校化学工程学报,2016,30(2):268-275,8.
