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Synthesis, characterization, and swelling studies of pH‐ and thermosensitive hydrogels for specialty applications
Author(s) -
Chauhan Ghanshyam S.,
Chauhan Sandeep
Publication year - 2008
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.28011
Subject(s) - methacrylamide , self healing hydrogels , swelling , polymer chemistry , acrylic acid , polymer , methacrylic acid , swelling capacity , emulsion polymerization , chemistry , nuclear chemistry , ammonium bromide , polymerization , radical polymerization , materials science , acrylamide , organic chemistry , copolymer , pulmonary surfactant , biochemistry , composite material
In this article, we describe a novel pH‐and temperature‐sensitive and moderately salt tolerant hydrogels based on acrylic acid (AAc) and methacrylic acid (MAAc) by employing a novel research plan. AAc and MAAc have been converted to N ‐isopropylacrylamide ( N ‐ i ‐PAAm) and N ‐isopropyl methacrylamide ( N ‐ i ‐PMAAm), respectively, via amidation with isopropyl amine, followed by polymerization to respective polymers. These polymers were further converted into networks in the presence of AAc and MAAc and N , N ‐methylene bisacrylamide ( N , N ‐MBAAm). The networks thus formed consist of both amides and carboxylic acid groups. Characterization of these networks has been carried out by nitrogen analysis, FTIR, NMR, and scanning electron microscopy for the investigation of different structural aspects of the synthesized polymers. Swelling studies of these networks have been carried out as a function of time, temperature, pH, and in the presence of additives, sodium dodecyl sulfate, cetyl trimethyl ammonium bromide, and 5% NaCl solution. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008