Ali, Jaffar BM and Venkatachalam, S and Kumar, A (1997) On the water-induced critical double point in a polymer solution: the role of isotopic substitution. In: Pramana - Journal of Physics, 49 (5). pp. 493-504.
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Abstract
This paper examines the effect of substitution of water by heavy water in a polymer solution of polystyrene (molecular weight = 13000) and acetone. A critical double point (CDP), at which the upper and the lower partially-miscible regions merge, occurs at nearly the same coordinates as for the system [polystyrene + acetone + water]. The shape of the critical line for [polystyrene + acetone + heavy water] is highly asymmetric. An explanation for the occurrence of the water-induced CDP in [polystyrene + acetone] is advanced in terms of the interplay between contact energy dissimilarity and free-volume disparity of the polymer and the solvent. The question of the possible existence of a one-phase hole in an hourglass phase diagram is addressed in [polystyrene + acetone + water]. Our data exclude such a possibility.
Item Type: | Journal Article |
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Publication: | Pramana - Journal of Physics |
Publisher: | Indian Academy of Sciences |
Additional Information: | Copyright of this article belongs to Indian Academy of Sciences. |
Keywords: | Liquid-liquid transitions;critical double point;polymer demixing;isotopic substitution. |
Department/Centre: | Division of Physical & Mathematical Sciences > Physics |
Date Deposited: | 17 Jun 2011 05:12 |
Last Modified: | 17 Jun 2011 05:12 |
URI: | http://eprints.iisc.ac.in/id/eprint/38340 |
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