X-Ray Powder Diffraction Studies of Polyhydrates of Cross-Linked Tetraisoamylammonium Polyacrylates

Autor: D. Yu. Naumov, A. Yu. Manakov, V. Yu. Komarov, Yu. A. Dyadin, I. S. Terekhova, V. V. Feklistov
Rok vydání: 2005
Předmět:
Zdroj: Journal of Inclusion Phenomena and Macrocyclic Chemistry. 52:207-211
ISSN: 1573-1111
0923-0750
DOI: 10.1007/s10847-004-7236-x
Popis: X-ray powder diffraction studies were performed of the polyhydrates, formed at positive temperature in swelled grains of carboxylic cation-exchange resins in the form of tetraisoamylammonium (cross-linked tetraisoamylammonium polyacrylates, differing in the degree of cross-linking: 1, 2 and 3%). It was shown that the polyhydrates exist as the crystalline phase under specific conditions, determined earlier by DTA technique. Diffraction patterns of the samples, recorded at the temperature +3 ± 1 °C, indicate that the polyhydrates crystallize in hexagonal symmetry, the unit cell parameters are close to a=12.25 A, c=12.72 A and do not depend significantly upon the degree of cross-linking. The suppositions were made concerning the size of hydrate crystallites, formed in the swelled grains of the studied resins.
Databáze: OpenAIRE
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