Abstract
Slightly dried cast films of poly(sulfone-amide) synthesized from isophthaloyl dichloride and the mixed diamine which consisted of bis[4-(4-aminophenoxy)phenyl]sulfone and m-phenylenediamine (4:6) were thermally treated and the permeabilities of H2 and CO through them were measured. Though the permeability coefficient for H2 (PH2) was not affected by thermal treatment, the permeability coefficient for CO (PCO) decreased with increasing temperature of the thermal treatment. As a result, the permeability ratio for H2 relative to CO (PH2/PCO) increased from 50 to 139, when the temperature of the thermal treatment was elevated from 30°C to 220°C. Changes of the membrane structure by thermal treatment were evaluated from measurements of density, thermomechanical analysis (TMA), thermogravimetric analysis (TG), and dynamic viscoelasticity. A decrease of a residual solvent in the membrane and a rearrangement of the polymer chains made the membrane structure more compact and increased PH2/PCO.
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F. P. McCandless, Ind. Eng. Chem. Process Res. Dev., 11, 470 (1972).
U. T. Stannett, W. J. Koros, D. R. Paul, H. K. Lonsdale, and R. W. Baker, Adv. Polym. Sci., 32, 69 (1979).
K. Haraya, K. Obata, T. Hakuta, and H. Yoshitome, Membrane, 11, 48 (1986).
Y. Sakaguchi, H. Kawada, and Y. Kato, Kobunshi Ronbunshu, 43, 755 (1986).
Y. Sakaguchi, M. Tokai, H. Kawada, and Y. Kato, Polym. J., 20, 365 (1988).
R. M. Barrer, Trans. Faraday Soc., 35, 628 (1939).
T. Takahashi, T. Yamamoto, and I. Tsujimoto, J. Macromol. Sci., Phys., B16, 539 (1979).
S. Minami, H. Kakida, and J. Nakauchi, JP Kokai Tokkyo Koho 52-13545, 52-84285.
and S. Minami, H. Kakida, and J. Nakauchi, JP Kokai Tokkyo Koho 52-98764
V. V. Kochervinsky, V. M. Zagainov, V. G. Sokolv, and Yu. V. Zelenov, J. Polym. Sci., Polym. Chem. Ed., 19, 1197 (1981).
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Sakaguchi, Y., Tokai, M., Kawada, H. et al. Separation of H2 and CO through Poly(sulfone-amide) Membranes III. Changes of Gas Permeability and Membrane Structure in the Process of Solvent Removal. Polym J 20, 785–790 (1988). https://doi.org/10.1295/polymj.20.785
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DOI: https://doi.org/10.1295/polymj.20.785