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Flocculation characteristics of grafted and ungrafted starch, amylose, and amylopectin

โœ Scribed by S. K. Rath; R. P. Singh

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
184 KB
Volume
66
Category
Article
ISSN
0021-8995

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โœฆ Synopsis

Graft copolymers of starch, amylose, and amylopectin with polyacrylamide have been synthesized using a ceric-ion-initiated solution polymerization technique. In the case of amylopectin-g-polyacrylamide ( Ap-g-PAM ) , four graft copolymers have been synthesized with variation in the number and length of grafted polyacrylamide chains. The flocculation behavior has been studied in a 0.25% kaolin suspension. It has been found that among the three graft copolymers of the starch family, Ap-g-PAM is the best flocculating agent compared to starch-g-polyacrylamide ( St-g-PAM ) and amylose-g-polyacrylamide ( Am-g-PAM) . Among the series of Ap-g-PAM, the one with fewer but longer polyacrylamide chains has been found to be the most effective flocculant.

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