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A study of the uptake and gelation reactions of Cr(III) oligomers with polyacrylamide
Author(s) -
Dona Carol L.,
Green Don W.,
Willhite G. Paul
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(19970516)64:7<1381::aid-app18>3.0.co;2-#
Subject(s) - polyacrylamide , polymer chemistry , polymer science , chemical engineering , chemistry , materials science , engineering
The reaction rates of Cr(III) oligomers with partially hydrolyzed (PAAm) polyacrylamide were measured. The oligomers were prepared in relatively pure form using liquid chromatography, allowed to react with polymer, quenched, and then separated using equilibrium dialysis. In the pH range of 4–5, Cr(III) concentrations in the range of 8–30 ppm and polymer concentrations in the range of 4000–20,000 ppm, reaction rates increased with increasing oligomer size, concentration, and pH. Gelation rates determined using rheological measurements were found to follow closely the Cr(III) reaction rates. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 64: 1381–1391, 1997