Swelling equilibria of poly(N-isopropylacrylamide) gel in aqueous polymer solutions

T. Ishidao, M. Akagi, H. Sugimoto, Y. Onoue, Y. Iwai, Y. Arai

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Swelling equilibria of poly(N-isopropylacrylamide) (NIPA) gel in poly (ethylene glycol) (PEG)-water mixtures and the concentrations of PEG inside and outside the NIPA gel at 298.2K are discussed. NIPA gel exhibited continuous deswelling behavior for PEG6000, 20000, and 50000, a volume phase transition for PEG 1000, and reentrant behavior for PEG200. From the partition of PEG, it was found that the PEG molecules could not penetrate into the gel network in shrunk state. The gel absorbed low molecular weight PEGs but excluded high molecular weight PEGs in swollen state. A thermodynamic model, based on the Flory-Huggins theory coupled with the osmotic pressure by rubber elasticity proposed by Flory, was applied to correlate the swelling behavior of the gel in PEG-water mixtures.

Original languageEnglish
Pages (from-to)119-129
Number of pages11
JournalFluid Phase Equilibria
Volume104
Issue numberC
DOIs
Publication statusPublished - Mar 1 1995

Fingerprint

Polymer solutions
swelling
Polyethylene glycols
Swelling
Gels
gels
polymers
osmosis
Molecular weight
low molecular weights
rubber
water
poly-N-isopropylacrylamide
Water
glycols
partitions
molecular weight
Rubber
ethylene
elastic properties

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

Swelling equilibria of poly(N-isopropylacrylamide) gel in aqueous polymer solutions. / Ishidao, T.; Akagi, M.; Sugimoto, H.; Onoue, Y.; Iwai, Y.; Arai, Y.

In: Fluid Phase Equilibria, Vol. 104, No. C, 01.03.1995, p. 119-129.

Research output: Contribution to journalArticle

Ishidao, T. ; Akagi, M. ; Sugimoto, H. ; Onoue, Y. ; Iwai, Y. ; Arai, Y. / Swelling equilibria of poly(N-isopropylacrylamide) gel in aqueous polymer solutions. In: Fluid Phase Equilibria. 1995 ; Vol. 104, No. C. pp. 119-129.
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