The effect of preparation temperature on phase transitions of N-isopropylacrylamide gel


Pekcan O., Kara S.

PHASE TRANSITIONS, vol.76, no.6, pp.601-609, 2003 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 76 Issue: 6
  • Publication Date: 2003
  • Doi Number: 10.1080/0141159021000037259
  • Title of Journal : PHASE TRANSITIONS
  • Page Numbers: pp.601-609

Abstract

The spinodal decomposition of N-isopropylacrylamide (NIPA) gels prepared at various onset temperatures, To, was studied by photon transmission. It was observed that the increase in turbidity is much faster in a gel prepared at higher Ton than at lower To, values, which indicated that the NIPA-water system reaches the spinodal decomposition much faster for a gel prepared at high T-on. It is understood that a NIPA gel prepared at high T-on possesses more heterogeneities which are gained during gelation and has a low spinodal temperature, T-s. However, NIPA gels prepared at lower T-on values go to spinodal decomposition at higher T-s values.