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Flocculation characteristics of grafted and ungrafted starch, amylose, and amylopectin
Author(s) -
Rath S. K.,
Singh R. P.
Publication year - 1997
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19971128)66:9<1721::aid-app10>3.0.co;2-y
Subject(s) - polyacrylamide , amylopectin , amylose , starch , copolymer , flocculation , acrylamide , polymer chemistry , chemistry , chemical engineering , polymer , organic chemistry , engineering
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. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 66: 1721–1729, 1997