Abstract
A pair of dissimilar polymers with high molecular weights, poly(acrylonitrile-co-styrene) poly(acrylonitrile-co-butadiene), was found to exhibit both UCST (upper critical solution temperature) and LCST (lower critical solution temperature) behavior. This phase behavior is interpreted by combining the solubility parameter theory involving the free volume term and the recent idea of “miscibility window” for the polymer blends including random copolymers.
Similar content being viewed by others
Article PDF
References
P. J. Flory, “Principles of Polymer Chemistry,” Cornell University Press, Ithaca, New York, 1953.
D. R. Paul and S. Newman, Ed., “Polymer Blends,” Academic Press, New York, N. Y., 1978.
O. Olabishi, L. M. Robeson, and M. T. Shaw, “Polymer–Polymer Miscibility,” Academic Press, New York, N. Y., 1979.
R. J. Roe and W. C. Zin, Macromolecules, 13, 1221 (1980).
S. L. Zacharius, G. ten Brinke, W. J. NacKnight, and F. E. Karasz, Macromolecules, 16, 381 (1983).
T. Ougizawa, T. Inoue, and H. W. Kammer, Macromolecules, 18, 2089 (1985).
P. J. Flory, R. A. Orwoll, and A. Vrij, J. Am. Chem. Soc., 86, 3507 (1964).
P. J. Flory, R. A. Orwoll, and A. Vrij, J. Am. Chem. Soc., 86, 3515 (1964).
P. J. Flory, J. Chem. Phys., 87, 1833 (1965).
D. Patterson and A. Roberd, Macromolecules, 11, 690 (1978).
R. P. Kambour, J. T. Bendler, and P. C. Bopp, Macromolecules, 16, 753 (1983).
G. ten Brinke, F. E. Karasz, and W. J. MacKnight, Macromolecules, 16, 1827 (1983).
D. R. Paul and J. W. Barlow, Polymer, 25, 487 (1984).
T. Inoue, T. Ougizawa, O. Yasuda, and K. Miyasaka, Macromolecules, 18, 57 (1985).
T. Shephered, Econ. Geol., 76, 1244 (1981).
T. Ougizawa, Y. Takagi, and T. Inoue, Polym. Prepr., Jpn., 34, 771 (1985). submitted to Polymer.
I. C. Sanchez and R. H. Lacombe, J. Phys. Chem., 80, 2352 (1976).
R. H. Lacombe and I. C. Sanchez, J. Phys. Chem., 80, 2568 (1976).
I. C. Sanchez and R. H. Lacombe, Macromolecules, 11, 1145 (1978).
J. H. Hildebrand and R. L. Scott, “The Solubility of Non-Electrolytes,” 3rd ed, Reinhold, New York, N.Y., 1950.
J. Biros, L. Zeman, and D. Patterson, Macromolecules, 4, 30 (1971).
J. Brandrup and E. H. Immergut, Ed., “Polymer Handbook,” Interscience, New York, N. Y., 1967.
F. London, Z. Physik, 63, 245 (1930).
K ij are measurable quantities. Experiments are under way.
Referee let us know that UCST behavior has been observed in polystyrene/poly(vinyl methyl ether) system.25,26
T. K. Kwei, T. Nishi, and R. F. Roberts, Macromolecules, 7, 667 (1974).
J. M. G. Cowie and S. Saeki, Polym. Bull., 6, 75 (1981).
εij is the energy of i—j contact. εii is related to (ΔEv)i by εii=[(ΔEv)i/Vi](2/AZ), where A is Avogadro’s number, Z is the coordination number, and Vi is the molar volume of i-component.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Ougizawa, T., Inoue, T. UCST and LCST Behavior in Polymer Blends and Its Thermodynamic Interpretation. Polym J 18, 521–527 (1986). https://doi.org/10.1295/polymj.18.521
Issue Date:
DOI: https://doi.org/10.1295/polymj.18.521
Keywords
This article is cited by
-
Investigation of intrinsic characteristics of polymer blends via molecular simulation: a review
Korea-Australia Rheology Journal (2023)
-
A brillouin scattering study of a polymer blend showing upper critical solution temperature behaviour
Polymer Bulletin (1990)