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Anionic graft polymerization of 4-vinyl pyridine on starch and dextrin

✍ Scribed by Sabar Sasson; Albert Zilkha

Publisher
Elsevier Science
Year
1969
Tongue
English
Weight
593 KB
Volume
5
Category
Article
ISSN
0014-3057

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✦ Synopsis

The anionic graft polymerization of 4-vinyl pyridine on the potassium alkoxide derivative of starch or dextrin in dimethyl sulphoxide solution was studied. Graft polymerization occurred only at relatively high alkoxide concentration. The yields of pure graft polymer were low due to extensive homopolymerization, probably caused by chain transfer to the acidic hydrogen of the monomer. The grafted side chains of poly-.4-vinyl pyridine were detached from the carbohydrate backbone by acid hydrolysis, and their molecular weights were found to increase with monomer concentration in accordance with a "living" polymerization. The results obtained in the graft polymerization on starch and dextrin were similar.

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