The transport properties of CO₂ and CH₄ for TMSPSf (bisphenol A trimethylsilylated polysulfone) were measured, and compared with the values for PSf (bisphenol A polysulfone) and MPSf (bisphenol A methylated polysulfone) to explain the effect of molecular structure of polysulfones on gas transport properties. The permeability coefficients of three polysulfones rank in the order : TMSPSf>PSf>MPSf. TMSPSf is several times more permeable than PSf. The effect of the substituents on chain packing was related to the gas transport properties. The ranking of permeability coefficient correlates well with fractional free volume. The variation of d-spacing is also reasonably consistent with the permeability coefficient. The effects of pressure on the sorption and permeation properties of polysulfones were examined. The permeation properties for a mixture of CO₂ and CH₄ were also measured and these results were compared with the values of pure gases. The sorbed concentrations and permeability coefficients are well fitted to dual mode model. The permeability coefficients of each gas of binary mixture are reduced than those for pure gases, and the extent of reduction in permeability coefficient is the smallest for TMSPSf, which has the highest value of Langmuir capacity constant.

Trimethylsilylated Polysulfone Sorption Permeation Mixed Gas

Aitken CL, Koros WJ, Paul DR, Macromolecules, 25, 3424 (1992) 
Balta-Calleja FJ, Vonk CG, "The Theory of Coherent X-Ray Scattering," in "X-Ray Scattering of Synthetic Polymers," Elsevier, Amsterdam, The Netherlands, 1 (1989)
Bhide BD, Stern SA, J. Membr. Sci., 81, 209 (1993) 
Bollinger WA, MacLean DS, Narayan RS, Chem. Eng. Prog., Oct., 27 (1982)
Bondi A, J. Phys. Chem., 68, 441 (1964)
Chern RT, Koros WJ, Yuri B, Hopenberg HB, Stanett VT, J. Polym. Sci. B: Polym. Phys., 22, 1061 (1984)
Ghosal K, Freeman BD, Chern RT, Alvarez JC, Delacampa JG, Lozano AE, Deabajo J, Polymer, 36(4), 793 (1995) 
Ghosal K, Chern RT, Freeman BD, Daly WH, Negulescu II, Macromolecules, 29(12), 4360 (1996) 
Guiver MD, Kutowy O, Apsimon JW, Polymer, 30, 1137 (1989) 
Guiver MD, Apsimon JW, Kutowy O, "Preparation of Substituted Polysulfones through Ortho-Metalated Intermediates," U.S. Patent, 4,797,457 (1989)
Hong SI, Kim HJ, Park HY, Kim TJ, Jeong YS, J. Korean Ind. Eng. Chem., 7(5), 877 (1996)
Ichiraku Y, Stern SA, Nakagawa T, J. Membr. Sci., 34, 5 (1987) 
Jacobson SH, Polym. Prepr., 32, 39 (1991)
Kesting RE, Fritsche AK, "Theory of Gas Transport in Membranes," in "Polymeric Gas Separation Membranes," John Wiley & Sons, New York, NY, 19 (1993)
Kim HJ, Hong SI, Korean J. Chem. Eng., 14(3), 168 (1997)
Kim TH, Koros WJ, Husk GR, O'Brien KC, J. Membr. Sci., 37, 45 (1988) 
Koros WJ, Chern RT, "Separation of Gaseous Mixtures Using Polymer Membranes," in Rousseau, R.W. (Ed.), "Handbook of Separation Process," Wiley-Interscience, New York, NY, 862 (1987)
Koros WJ, Fleming GK, J. Membr. Sci., 83, 1 (1993) 
McHattie JS, Koros WJ, Paul DR, J. Polym. Sci. B: Polym. Phys., 29, 731 (1991) 
McHattie JS, Koros WJ, Paul DR, Polymer, 32, 840 (1991) 
McHattie JS, Koros WJ, Paul DR, Polymer, 32, 2618 (1991) 
McHattie JS, Koros WJ, Paul DR, Polymer, 33, 1701 (1992) 
Mulder M, "Materials and Material Properties," in "Basic Principles of Membrane Technology," Kluwer Academic Publishers, Dordrecht, The Netherlands, 17 (1991)
Muruganandam N, Koros WJ, Paul DR, J. Polym. Sci. B: Polym. Phys., 25, 1999 (1987) 
Paul DR, Koros WJ, J. Polym. Sci. B: Polym. Phys., 14, 675 (1976)
Pixton MR, Paul DR, Polymer, 36(16), 3165 (1995) 
Rautenbach R, Welsch K, J. Membr. Sci., 87(1-2), 107 (1994) 
Stern SA, J. Membr. Sci., 94, 1 (1994)
VanKrevelen DW, "Volumetric Properties," in "Properties of Polymers," Elsevier, Amsterdam, The Netherlands, 71 (1990)
Vieth WR, Tam PM, Michaels AS, J. Colloid Interface Sci., 22, 360 (1966)