Abstract
To elucidate the mechanism of gas sorption in polymer blends in glassy and rubbery states, CO2 sorption of polystyrene [PS] (Tg≒75°C), poly(vinylmethylether) [PVME] (Tg≒−26°C), and their blends was studied at 25°C and the influence of the single-phase or separated-phase of their blends on sorption properties was also investigated. The solubility in the rubbery polymer blends obeyed Henry’s law and that in the glassy blends were described well by the dual-mode sorption model which consists of two contributions of Henry’s law mode and Langmuir mode sorption applied often to glassy polymer-gas systems. The dual-mode sorption parameters were obtained by a curve fitting of experimental data to the theoretical curve. The value of Henry’s law constant kD of the single-phase polymer blends deviated negatively from semilogarithmic additivity. The kD of the phase-separated blends was slightly higher than that of single-phase blends and was smaller than the semilogarithmic additivity, reflecting that the single-phase blends did not separate completely to the pure polymer phases of PS and PVME but to two mixed phases. The Langmuir sorption capacity term CH′ of single-phase or phase-separated blends was proportional to (Tg−25°C) of each phase, irrespective of the single-phase or separated-phase and the CH′ became zero at the temperature above the Tg.
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D. R. Paul and J. W. Barlow, J. Macromol. Sci., Rev. Macromol. Chem., C18, 109 (1980).
O. Olabishi, L. M. Robeson, and M. T. Shaw, Ed., “Polymer-Polymer Miscibility,” Academic Press, New York, N. Y., 1979.
D. R. Paul and S. Newman, Ed., “Polymer Blends,” Vols. 1 & 2, Academic Press, New York, N. Y., 1978.
“Polymer Alloy-Principles and Application,” [in Japanese], Society of Polymer Science Japan, Ed., Tokyo Kagaku Dojin, Tokyo, 1981.
S. Akiyama, T. Inoue, and T. Nishi, “Polymer Blends,” [in Japanese], CMC, Tokyo, 1981.
Y. Tsujita, K. Iwakiri, T. Kinoshita, and A. Takizawa, J. Polym. Sci., Polym. Phys. Ed., 25, 415 (1987).
P. Masi, D. R. Paul, and J. W. Barlow, J. Polym. Sci., Polym. Phys. Ed., 20, 15 (1982).
G. Morel and D. R. Paul, J. Membrane Sci., 10, 273 (1982).
J. S. Chiou and D. R. Paul, J. Appl. Polym. Sci., 32, 4793 (1986).
J. S. Chiou and D. R. Paul, J. Appl. Polym. Sci., 33, 2935 (1987).
N. Muraganandam and D. R. Paul, J. Polym. Sci., Polym. Phys. Ed., 25, 2315 (1987).
H. G. Spencer and J. A. Yavorsky, J. Appl. Polym. Sci., 28, 2937 (1983).
M. Kato, Y. Tsujita, T. Kinoshita, and A. Takizawa, in preparation.
T. Nishi, T. T. Wang, and T. K. Kwei, Macromolecules, 8, 227 (1975).
M. Banks, J. Leffingwell, and C. Thies, J. Polym. Sci., A-2, 10, 1097 (1971).
R. Meares, J. Am. Chem. Soc., 76, 3415 (1954).
R. M. Barrer, J. A. Barrie, and J. Slater, J. Polym. Sci., 27, 177 (1958).
A. S. Michaels, W. R. Vieth, and A. Barrie, J. Appl. Phys., 34, 13 (1963).
A. G. Wonders and D. R. Paul, J. Membrane Sci., 5, 63 (1979).
W. J. Koros and D. R. Paul, Polym. Eng. Sci., 20, 14 (1980).
A. H. Chan and D. R. Paul, Polym. Eng. Sci., 20, 87 (1980).
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Hachisuka, H., Sato, T., Tsujita, Y. et al. CO2 Gas Sorption Properties in Single-Phase and Phase-Separated Polystyrene/Poly(vinylmethylether) Blends. Polym J 21, 417–424 (1989). https://doi.org/10.1295/polymj.21.417
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DOI: https://doi.org/10.1295/polymj.21.417