Structural investigation of hydrate compounds of the tetraisoamylammonium form of polyacrylate ion exchange resins. Crystal structure of a clathrate hydrate of linear tetraisoamylammonium polyacrylate

被引:9
作者
Soldatov, D. V. [1 ]
Suwinska, K. [2 ]
Terekhova, I. S. [3 ]
Manakov, A. Yu. [3 ]
机构
[1] Univ Guelph, Dept Chem, Guelph, ON N1G 2W1, Canada
[2] Polish Acad Sci, Inst Phys Chem, Warsaw, Poland
[3] Russian Acad Sci, AV Nikolaev Inst Inorgan Chem, Siberian Div, Novosibirsk, Russia
关键词
polymer hydration; two-component system; inclusion compounds; polymeric guest; crystal structure;
D O I
10.1007/s10947-008-0099-z
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
A polyhydrate of the tetraisoamylammonium salt of linear (uncrosslinked) polyacrylate (similar to 25 monomeric units in the polyacrylate chain) is described and compared to polyhydrates of cross-linked tetraisoamylammonium polyacrylates (0.5-3% of cross-linking with divinylbenzene or divinylsulfide). Powder X-ray diffraction reveals that the polyhydrate containing a linear polyacrylate molecule has the same structure (hexagonal, a = 12.26 angstrom, c = 12.71 angstrom at 3 degrees C) as polyhydrates of the cross-linked polyacrylate molecules. A single crystal of the polyhydrate obtained from an aqueous solution of linear tetraisoamylammonium polyacrylate is studied by X-ray diffraction at -173 degrees C. The structure is hexagonal; space group P-6m2; the polyhydrate framework is a slightly distorted variant of the hexagonal structure-I of clathrate hydrates.
引用
收藏
页码:712 / 718
页数:7
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