Abstract
The Flory interaction parameter χ12 in a single-phase mixture of poly(ether sulfone) and poly(hydroxy ether of bisphenol-A) was measured at various temperatures by the light scattering method based on random phase approximation. The χ12 value at two-phase region above LCST (lower critical solution temperature) was estimated by curve fitting of the Flory-Huggins theory to the binodal curve observed. Combining the results, temperature dependence of χ12 was obtained in a wide range. The interactional energy contribution in χ12, χH, was estimated by the infrared spectroscopy method based on the acid-base interaction theory by Drago. The difference between χ12 and χH, which is assumed to be the free volume term in χ12, was found to be a concave function of temperature; i.e., χ(T) is an increasing function at high temperature region, as has been predicted theoretically, but it is a decreasing function at low temperature region. This may lead to a thermodynamic interpretation of the appearance of both LCST and UCST (upper critical solution temperature) in mixtures of dissimilar polymers with high molecular weights, as reported in recent literature.
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References
D. R. Paul and S. Newman Ed., “Polymer Blends,” Academic Press, New York, N.Y., 1978.
T. Ougizawa, T. Inoue, and H. W. Kammer, Macromolecules, 18, 2089 (1985).
G. Cong, Y. Haung, W. J. MacKnight, and F. E. Karasz, Macromolecules, 19, 2765 (1986).
H. Saito, Y. Fujita, and T. Inoue, Polym. J., 19, 405 (1987).
F. S. Bates, G. D. Wignall, and W. C. Koehler, Phys. Rev. Lett., 55, 2425 (1985).
T. Ougizawa and T. Inoue, Polym. J., 18, 521 (1986).
B. S. Morra and R. S. Stein, J. Polym. Sci., Polym. Phys. Ed., 20, 2243 (1982).
J. E. Harris, D. R. Paul, and J. W. Barlow, Polym. Eng. Sci., 23, 676 (1983).
J. H. Wendorff, J. Polym. Sci., Polym. Lett. Ed., 18, 439 (1980).
M. Shibayama, H. Yang, R. S. Stein, and C. C. Han, Macromolecules, 18, 2179 (1985).
P. G. de Gennes, “Scaling Concepts in Polymer Physics,” Cornell University Press, New York, N.Y., 1979.
R. S. Drago, N. O’Bryan, and G. C. Vogel, J. Am. Chem. Soc., 92, 3924 (1970).
F. M. Fowkes, D. O. Tishler, J. A. Wolfe, L. A. Lannigan, C. M. Adamu-gohn, and M. J. Halliwell, J. Polym. Sci., Polym. Chem. Ed., 22, 547 (1984).
T. K. Kwei, E. M. Pearce, F. Ren, and J. P. Chen, J. Polym. Sci., Polym. Phys. Ed., 24, 1597 (1986).
V. B. Singh and D. J. Walsh, J. Macromol. Sci., Phys., B25, 65 (1986).
M. M. Coleman, P. C. Painter, Appl. Spect. Rev., 20, 255 (1984).
R. S. Stein and J. J. Keane, J. Polym. Sci., 17, 21 (1955).
J. Maruta, T. Ougizawa, and T. Inoue, Polymer, 29, 2056 (1988).
The spectrum of neat Phenoxy was also resolved into the three Lorentzians. A small band at intermediate region may be processed by the curve fitting with symmetric Lorentzians. The area of intermediate band of neat Phenoxy was subtracted from the AHB of blend. After this correction, ψ values were calculated. The ψ value can be also estimated as the fraction of area of intermediate peak of the difference spectrum obtained by subtraction of the spectrum of neat Phenoxy from that of the blend. The ψ thus obtained was equal to that by the peak resolution.
H. W. Kammer, T. Ougizawa, and T. Inoue, Polymer, 30, 888 (1989).
H. Saito, M. Matsuura, T. Okada, and T. Inoue, Polym. J., 21, 357 (1989).
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Saito, H., Tsutsumi, D. & Inoue, T. Temperature Dependence of the Flory Interaction Parameter in a Single-Phase Mixture of Poly(hydroxy ether of bisphenol-A) and Poly(ether sulfone). Polym J 22, 128–134 (1990). https://doi.org/10.1295/polymj.22.128
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DOI: https://doi.org/10.1295/polymj.22.128
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