Abstract
Cellulose derivatives containing poly(oxyethylene oxide) chains in their structural units are prepared by the oxyalkylation of cellulose sulfates in the presence of an alkaline catalyst. The degrees of sulfation of oxyethylated cellulose sulfates vary from 0.8 to 2.0, and the molar substitutions with ethylene glycol residues are in the range from 3 to 10. The NMR study of the products of complete hydrolysis of the compounds of interest shows that oxyethyl groups predominantly add at second and third positions of the anhydrous glucose unit of cellulose. It is found that the oxyethylation of cellulose sulfates decreases the reduced viscosity of their aqueous solutions. The compounds under consideration exhibit inhibitory ability with respect to the blood coagulation, that is, antithrombin activity, which varies in the range 0.5 to 34.4 units/mg.
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