Swelling behavior of thermoreversible poly(N-isopropylacrylamide-co-N-vinylimidazole) hydrogels

Isik B., Gunay Y.

JOURNAL OF APPLIED POLYMER SCIENCE, vol.94, no.4, pp.1619-1624, 2004 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 94 Issue: 4
  • Publication Date: 2004
  • Doi Number: 10.1002/app.20915
  • Journal Name: JOURNAL OF APPLIED POLYMER SCIENCE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1619-1624
  • Hacettepe University Affiliated: No

Abstract

Thermoresponsive hydrogels based on N-isopropylacrylamide and N-vinylimidazole were synthesized, and their swelling-deswelling behavior was studied as a function of the total monomer concentration. For copolymeric structures with better thermoresponsive properties with respect to poly(N-isopropylacrylamide-co-N-vinylimidazole) hydrogels, these hydrogels were protonated with HCl and HNO3, and the copolymer behaviors were compared with those of the unprotonated hydrogels. The temperature was changed from 4 to 70degreesC at fixed pHs and total ionic strengths. The equilibrium swelling ratio, dynamic swelling ratio, and dynamic deswelling ratio were evaluated for all the hydrogels. (C) 2004 Wiley Periodicals, Inc.