Thermodynamic model of gas permeability in polymer membranes |
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| Authors: | Do Kyoung Lee Yong Woo Kim Kyung Ju Lee Byoung Ryul Min Jong Hak Kim |
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| Affiliation: | 1. Department of Chemical Engineering, Yonsei University, 134 Shinchon‐dong, Seodaemun‐gu, Seoul 120‐749, South Korea;2. Department of Chemical Engineering, Yonsei University, 134 Shinchon‐dong, Seodaemun‐gu, Seoul 120‐749, South KoreaDepartment of Chemical Engineering, Yonsei University, 134 Shinchon‐dong, Seodaemun‐gu, Seoul 120‐749, South Korea |
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| Abstract: | ![]()
A new molecular thermodynamic model is developed of the gas permeability in polymer membranes on the basis of configurational entropy and Flory‐Huggins theory to predict permeability dependence on the concentration of penetrant. Three kinds of configurational entropy are taken into account by this model; that is, the disorientation entropy of polymer, the mixing entropy, and specific interaction entropy of polymer/gas. The validity of the mathematical model is examined against experimental gas permeability for polymer membranes. Agreement between experimental and predicted permeability is satisfactory. © 2007 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 45: 661–665, 2007 |
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| Keywords: | configurational entropy Flory‐Huggins theory gas permeation membrane thermodynamics |
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