SCI和EI收录∣中国化工学会会刊

›› 2008, Vol. 16 ›› Issue (4): 605-611.

• THERMODYNAMICS AND CHEMICAL ENGINEERING DATA • Previous Articles     Next Articles

Vapor-Liquid Equilibrium of Copolymer+Solvent Systems:Experimental Data and Thermodynamic Modeling with New UNIFAC Groups

Rogério A. G. Sé, Mart韓 Aznar   

  1. School of Chemical Engineering, State University of Campinas, UNICAMP P. O. Box 6066, 13081-970, Campinas-SP, Brazil
  • Received:2007-10-08 Revised:2008-04-20 Online:2008-08-28 Published:2008-08-28
  • Supported by:
    Fundacão de Amparo à Pesquisa do Estado de São Paulo(FAPESP)

Vapor-Liquid Equilibrium of Copolymer+Solvent Systems:Experimental Data and Thermodynamic Modeling with New UNIFAC Groups

Rogério A. G. Sé, Martín Aznar   

  1. School of Chemical Engineering, State University of Campinas, UNICAMP P. O. Box 6066, 13081-970, Campinas-SP, Brazil
  • 通讯作者: Martín Aznar, E-mail: maznar@feq.unicamp.br
  • 基金资助:
    Fundacão de Amparo à Pesquisa do Estado de São Paulo(FAPESP)

Abstract: Vapor-liquid equilibrium (VLE) data for copolymer solutions are necessary for several chemical processes. However, VLE data for copolymer solutions in the published report are rare. In this study, experimental VLE data for binary systems copolymer+solvent were obtained using a gravimetricsorption apparatus. The studied systems were hexane+poly (21% acrylonitrile-co-butadiene), hexane+poly (33% acrylonitrile-co-butadiene), hex-ane+poly (51% acrylonitrile-co-butadiene), hexane+poly (23% styrene-co-butadiene), hexane+poly (45% styrene-co-butadiene), and benzene+poly (44% styrene-co-methyl methacrylate) in the range 50-70℃. The experimental data were correlated with the UNIFAC and Elbro-FV group contribution models for the activity coefficient. Two sets of functional groups had been used to represent the monomers in copolymers:literature groups and new proposed groups. The mean deviations between experimental and calculated mass fractions about 2.4% with Elbro-FV and 13.3% with Zhong were observed when the groups proposed in this study were used, and of 3.5% for Elbro-FV and 13.2% for Zhong when literature groups were used.

Key words: copolymers, gravimetric sorption, vapor-liquid equilibrium

摘要: Vapor-liquid equilibrium (VLE) data for copolymer solutions are necessary for several chemical processes. However, VLE data for copolymer solutions in the published report are rare. In this study, experimental VLE data for binary systems copolymer+solvent were obtained using a gravimetricsorption apparatus. The studied systems were hexane+poly (21% acrylonitrile-co-butadiene), hexane+poly (33% acrylonitrile-co-butadiene), hex-ane+poly (51% acrylonitrile-co-butadiene), hexane+poly (23% styrene-co-butadiene), hexane+poly (45% styrene-co-butadiene), and benzene+poly (44% styrene-co-methyl methacrylate) in the range 50-70℃. The experimental data were correlated with the UNIFAC and Elbro-FV group contribution models for the activity coefficient. Two sets of functional groups had been used to represent the monomers in copolymers:literature groups and new proposed groups. The mean deviations between experimental and calculated mass fractions about 2.4% with Elbro-FV and 13.3% with Zhong were observed when the groups proposed in this study were used, and of 3.5% for Elbro-FV and 13.2% for Zhong when literature groups were used.

关键词: copolymers, gravimetric sorption, vapor-liquid equilibrium