CRYSTAL HYDRATES OF POLY[N-(2-D-GLUCOSE)A CRYLAMIDE]

The structure of poly[N-(2-D-glucose)acrylamide] was studied by FT-IR spectroscopy and DSC. It was found that, like starch, poly[N-(2-D-gluc ose)acrylanlide] has two crystal hydrate modifications: the major modi fication containing not more than 28% of weakly bound water (this modi fication is organized into rodlike structures) and the ''rigid structu re'' of pseudo-cross-links, which incorporates about 7% of water (this modification is organized into layers, whose bonding to the polymer i s stronger). The ratio between both crystal hydrate structures is cont rolled by the concentration of monomer and the polymerization temperat ure. This ratio determines the properties of the final polymer, its so lubility in particular. When the polymer swells or dissolves in water, its different modifications form solvation shells with different stru cture of water and, as a result, possess different sorption capacity.