Clathrate hydrates of cross-linked tetraisoamylammonium polyacrylates

By differential thermal analyses (DTA) and Schreinemakers’ method the clathrate formation in the systems water–cross-linked tetraisoamylammonium polyacrylates (3, 1 and 0.5% cross-linkages) was studied and the compositions of the polyhydrates which form were determined. It was shown using the DTA me...

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Bibliographic Details
Published in:Journal of supramolecular chemistry 2002-08, Vol.2 (4), p.393-399
Main Authors: Terekhova, I.S, Bogatyryov, V.L, Dyadin, Yu.A
Format: Article
Language:English
Subjects:
Clathrate hydrate
Phase diagram
Polyacrylate
Solid-fuel equilibria
Tetraalkylammonium salts
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Summary:By differential thermal analyses (DTA) and Schreinemakers’ method the clathrate formation in the systems water–cross-linked tetraisoamylammonium polyacrylates (3, 1 and 0.5% cross-linkages) was studied and the compositions of the polyhydrates which form were determined. It was shown using the DTA method that a decrease in the degree of cross-linking of polyacrylate results in an increase in the stability of the polyhydrates. From studies of the solubility isotherm (0 °C) in the three-component system tetraisoamylammonium polyacrylate (3% cross-linked)–water–ethanol, it was concluded that a clathrate hydrate of constant composition is formed. Tetraisomylammonium polyacrylates form clathrate hydrates with the polymeric ‘guest’ included in a host water framework; the stability and composition of the hydrates depend on the degree of cross-linking of the polymers.
ISSN:1472-7862
DOI:10.1016/S1472-7862(03)00064-9