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Z. K. Brzozowski, К. Noniewicz

Graft copolymerization of acrylamide onto starch initiated by redox system of Ce4+ —> Ce3+ ions.
Part II. A comparison with graft copolymerization in the presence of other radical initiators
and the physicochemical investigation of products

Polimery 1994, No 2, 82


DOI: dx.doi.org/10.14314/polimery.1994.082

Summary

The yield of polyacrylamide grafting onto starch using Na2S2O8, KMnO4, Ce(SO4)24H2O and a system consisting of Ce(SO4)24H2O+ KMnO4 as initiators has been compared. The last system was the most effective — the yield of grafting was up to 70%. Analysis of IR spectra of these copolymers allowed the determination of the kind of nitrogen containing groups existing there. X-ray patterns of copolymers revealed their amorphous character regardless of the grafting degree. Starch-graft-polyacrylamidehad thermal stability up to 200—250°C as determined by derivatographic analysis.


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