苯乙烯/二氧化碳/聚苯乙烯三元混合物的相平衡预测

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苯乙烯/二氧化碳/聚苯乙烯三元混合物的相平衡预测

吴家龙^a; 潘勤敏^a; G. L. Rempel^b

^a Institute of Polymer Engineering, Zhejiang University, Hangzhou 310027,China
^b Department of Chemical Engineering, University of Waterloo, ON, N2L 3G1,Canada

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2002-12-28 发布日期:2002-12-28
通讯作者: 吴家龙

Prediction of Phase Behavior for Styrene/CO2/Polystyrene Mixtures

WU Jialong^a; PAN Qinmin^a; G. L. Rempel^b

^a Institute of Polymer Engineering, Zhejiang University, Hangzhou 310027,China
^b Department of Chemical Engineering, University of Waterloo, ON, N2L 3G1,Canada

Received:1900-01-01 Revised:1900-01-01 Online:2002-12-28 Published:2002-12-28
Contact: WU Jialong

摘要/Abstract

摘要： A lattice fluid model, Sanchez-Lacombe equation, is used to predict the phase behavior for
a styrene/CO2/polystyrene ternary system. The binary parameters involved in the equation
were optimized using experimental data. Phase diagrams and the distribution coefficients of
styrene between polymer phase and fluid phase are obtained over a wide range of pressure,
temperature and composition. The analysis of ternary phase diagrams indicates that this
system at relatively high pressure or low temperature may display two-phase equilibrium,
and at low pressures or high temperatures three-phase equilibrium may appear. The
distribution coefficients of styrene between the fluid phase and the polymer phase increase
asymptotically to unity when the concentration of styrene increases. The results provide
thermodynamic knowledge for further exploitation of supercritical carbon dioxide assisted
devolatilization and impregnation.

关键词: ternary phase diagram;distribution coefficient;polystyrene;supercritical fluid

Abstract: A lattice fluid model, Sanchez-Lacombe equation, is used to predict the phase behavior for
a styrene/CO2/polystyrene ternary system. The binary parameters involved in the equation
were optimized using experimental data. Phase diagrams and the distribution coefficients of
styrene between polymer phase and fluid phase are obtained over a wide range of pressure,
temperature and composition. The analysis of ternary phase diagrams indicates that this
system at relatively high pressure or low temperature may display two-phase equilibrium,
and at low pressures or high temperatures three-phase equilibrium may appear. The
distribution coefficients of styrene between the fluid phase and the polymer phase increase
asymptotically to unity when the concentration of styrene increases. The results provide
thermodynamic knowledge for further exploitation of supercritical carbon dioxide assisted
devolatilization and impregnation.

Key words: ternary phase diagram, distribution coefficient, polystyrene, supercritical fluid

吴家龙, 潘勤敏, G. L. Rempel. 苯乙烯/二氧化碳/聚苯乙烯三元混合物的相平衡预测[J]. CIESC Journal.

WU Jialong, PAN Qinmin, G. L. Rempel. Prediction of Phase Behavior for Styrene/CO2/Polystyrene Mixtures[J]. .

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苯乙烯/二氧化碳/聚苯乙烯三元混合物的相平衡预测

Prediction of Phase Behavior for Styrene/CO2/Polystyrene Mixtures

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