Abstract
The initiation of cellulose grafting by Co 3+ and Ce 4+ salts has been investigated. Ultraviolet spectra reveal the existence of a complex of tetravalent cerium and cellulose. The rates of its formation and decomposition due to the redox reaction between cerium and cellulose have been investigated. The activation energy of this process in 0·15 N HNO 3 is 26·5 kcal/mole. We have shown that this complex plays an active part in the formation of the graft centres by means of the synthesis of graft copolymers and the interaction of cellulose containing the complex with methacrylate. The oxidation of cellulose by Ce 4+ is accompanied by the abstraction of HCOOH and CO 2 while the percentage of carbonyl and carboxyl groups scarcely changes. The examples of the formation of graft copolymers with Co 3+ and Ce 4+ salts are given.
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