| Modified van Laar’s Equation and Its Application to VLE ofPolymer Solutions |
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| 引用本文： | 俞春芳,沈晓燕,刘国杰.Modified van Laar’s Equation and Its Application to VLE ofPolymer Solutions[J].中国化学工程学报,2000,8(1):20-26. |
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| 作者姓名： | 俞春芳 沈晓燕 刘国杰 |
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| 作者单位： | DepartmentofChemistry,EastChinaUniversityofScienceandTechnology,Shanghai200237,China |
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| 基金项目： | Supported by the National Natural Science Foundation of China(No.29376236). |
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| 摘 要： | The original van Laar‘s theory has been modified. The internal pressures of components and mixture are expressed by Prank‘s relation and the excess entropy for mixing of components is also considered. A new activity coefficient equation, which can be satisfactorily applied to polymer solutions, is obtained. The calculated results for the VLE of 179 polymer solutions show that the accuracy of fit is evidently superior to UNIQUAC equation.
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| 关 键 词： | 修正范拉尔方程 聚合物溶液 气液平衡 内压力 活度系数方程 无限稀释 |
| 修稿时间： | |
Modified van Laar's equation and its application to VLE of polymer solutions |
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| YU Chunfang,SHEN Xiaoyan,LIUGuojie.Modified van Laar's equation and its application to VLE of polymer solutions[J].Chinese Journal of Chemical Engineering,2000,8(1):20-26. |
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| Authors: | YU Chunfang SHEN Xiaoyan LIUGuojie |
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| Affiliation: | Department of Chemistry, East China University of Science and Technology, Shanghai 200237,China |
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| Abstract: | The original van Laar's theory has been modified. The internal pressures of
components andmixture are expressed by Frank's relation and the excess entropy for mixing
of components is alsoconsidered. A new activity coefficient equation, which can be
satisfactorily applied to polymersolutions, is obtained. The calculated results for the
VLE of 179 polymer solutions show that theaccuracy of fit is evidently superior to UNIQUAC
equation. |
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| Keywords: | modified van Laar's theory internal pressure activity coefficient equation polymer solution activity coefficient at infinite dilution |
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