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Synthesis of N ‐hydroxymethyl acrylamide with β‐methyl hydrogen itaconate and itaconic acid hydrogels: Effects of the pH, composition, and ionic strength on the swelling behavior
Author(s) -
JeriaOrell M.,
Pizarro G. Del C.,
Marambio O. G.,
Huerta M.,
Geckeler K. E.
Publication year - 2006
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/app.22778
Subject(s) - itaconic acid , copolymer , swelling , ionic strength , polymer chemistry , acrylamide , hydroxymethyl , monomer , self healing hydrogels , chemistry , reactivity (psychology) , materials science , nuclear chemistry , polymer , organic chemistry , composite material , aqueous solution , medicine , alternative medicine , pathology
Copolymer gels were prepared by the radical copolymerization of N ‐hydroxymethyl acrylamide with itaconic acid and N ‐hydroxymethyl acrylamide with β‐methyl hydrogen itaconate. The ratios of both monomers were varied from 25 to 75 mol %, and the effects of external stimuli such as the pH and ionic strength of the swelling media were investigated. The gels were pH‐responsive, and an increase in the ionic strength of the solutions caused a decrease in the equilibrium degree of swelling of the copolymer gels. The monomer reactivity ratios were determined with the Kelen–Tüdös method. Moreover, the copolymer composition had a significant effect on the equilibrium swelling behavior of the two copolymers investigated. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 1735–1741, 2006