Abstract
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 Å, c=12.72 Å 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.
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Abbreviations
- n :
-
the degree of cross-linking of the polyacrylate anion
- RnCOO− :
-
cross - linked polyacrylate anion
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Terekhova, I.S., Manakov, a.A.Y., Feklistov, V.V. et al. X-Ray Powder Diffraction Studies of Polyhydrates of Cross-Linked Tetraisoamylammonium Polyacrylates. J Incl Phenom Macrocycl Chem 52, 207–211 (2005). https://doi.org/10.1007/s10847-004-7236-x
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DOI: https://doi.org/10.1007/s10847-004-7236-x