| Pressure Effects on Thermodynamics of Phase Behavior in Polystyrene/Methylcyclohexane Solutions |
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| 作者姓名： | LI Hong-fei JIANG Shi-chun AN Li-jia YU Dong-hong |
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| 作者单位： | LI Hong-fei1，JIANG Shi-chun1，AN Li-jia1 and YU Dong-hong2 1.State Key Laboratory of Polymer Physics and Chemistry，Changchun Institute of Applied Chemistry，Chinese Academy of Sciences，Changchun 130022，P.R.China;2.Section of Chemistry，Department of Life Sciences，Aalborg University，Aalborg DK 9000，Denmark |
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| 基金项目： | Supported by the National Natural Science Foundation of China(Nos.20574069,20490220,50303017,50373044and50340420392)，Programs of the Chinese Academy of Sciences(No.KJCX2-SW-H07)，the National Basic Research Program ofChina(No.2003CB615600). |
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| 摘 要： | The calculations presented in this paper are based on the Sanchez-Lacombe(SL)lattice fluid theory.The interaction energy parameter,g12/k,required in this approach was obtained by fitting the cloud points of polystyrene(PS)/methylcyclohexane(MCH)polymer solutions under pressure.The SL lattice fluid theory was used to calculate the spinodals,the binodals,and the Flory-Huggins(FH)interaction parameter of the solutions.The calculated results show that the SL lattice fluid theory can describe the dependences of thermodynamics of PS/MCH solutions on temperature and pressure very well.However,the calculated enthalpy and the excess volume changes indicate that the Clausius-Clapeyron equation cannot be suitable to describe pressure effect on PS/MCH solutions.Further analysis on the thermodynamics of this system under pressure shows that the role of entropy is more important than the excess volume in the present case.
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| 关 键 词： | 聚苯乙烯 甲基环己烷 聚合体溶液 热力学 压力效应 |
| 收稿时间： | 14 August 2006. |
| 修稿时间： | 2006-08-14 |
Pressure Effects on Thermodynamics of Phase Behavior in Polystyrene/Methylcyclohexane Solutions |
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| LI Hong-fei JIANG Shi-chun AN Li-jia YU Dong-hong.Pressure Effects on Thermodynamics of Phase Behavior in Polystyrene/Methylcyclohexane Solutions[J].Chemical Research in Chinese University,2007,23(5):613-621. |
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| Authors: | LI Hong-fei JIANG Shi-chun AN Li-jia YU Dong-hong |
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| Institution: | aState Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China;bSection of Chemistry, Department of Life Sciences, Aalborg University, Aalborg DK 9000, Denmark |
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| Abstract: | The calculations presented in this paper are based on the Sanchez-Lacombe(SL)lattice fluid theory.The interaction energy parameter,g12/k,required in this approach was obtained by fitting the cloud points of polystyrene(PS)/methylcyclohexane(MCH)polymer solutions under pressure.The SL lattice fluid theory was used to calculate the spinodals,the binodals,and the Flory-Huggins(FH)interaction parameter of the solutions.The calculated results show that the SL lattice fluid theory can describe the dependences of thermodynamics of PS/MCH solutions on temperature and pressure very well.However,the calculated enthalpy and the excess volume changes indicate that the Clausius-Clapeyron equation cannot be suitable to describe pressure effect on PS/MCH solutions.Further analysis on the thermodynamics of this system under pressure shows that the role of entropy is more important than the excess volume in the present case. |
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| Keywords: | PS/MCH polymer solution Thermodynamics Pressure effect |
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