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Thermoreversible hydrogels. VII. Synthesis and swelling behavior of poly( N ‐isopropylacrylamide‐ co ‐3‐methyl‐1‐vinylimidazolium iodide) hydrogels
Author(s) -
Lee WenFu,
Hsu ChengHawn
Publication year - 1999
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(19991220)74:13<3242::aid-app27>3.0.co;2-y
Subject(s) - copolymer , swelling , self healing hydrogels , polymer chemistry , poly(n isopropylacrylamide) , aqueous solution , chemistry , monomer , cationic polymerization , ionomer , nuclear chemistry , iodide , materials science , polymer , inorganic chemistry , organic chemistry , composite material
A series of N ‐isopropylacrylamide/3‐methyl‐1‐vinylimidazolium iodide (NIPAAm/MVI) copolymer gels were prepared from the various molar ratios of NIPAAm, cationic monomer MVI, and N , N ′‐methylene bisacrylamide (NMBA) in this study. The influence of the amount of MVI in the copolymer gels on the swelling behaviors was investigated in various aqueous saline solutions. Results showed that the swelling ratios (SRs) of copolymer gels were significantly greater than those of NIPAAm homopolymer gels, and the higher the MVI content, the higher the volume phase transition temperature. The SRs for the NIPAAm/MVI copolymer gels decreased with an increase of the salt concentration. In various saline solutions, results showed that the effect of divalent ions on the SR was greater than that of monovalent ions for these hydrogels. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 74: 3242–3253, 1999