Liquid-liquid equilibria of polyrotaxane and poly(vinyl alcohol)

Toshiyuki Kataoka, Yohei Nagao, Masatoshi Kidowaki, Jun Araki, Kohzo Ito

研究成果: Article

8 引用 (Scopus)

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Liquid-liquid equillibria (LLE) of the tertiary system of hydroxypropylated polyrotaxane (HPPR)-poly(vinyl alcohol) (PVA)-solvent have been investigated by focusing on the internal structures of HPPR-PVA blend gels. The phase diagrams of the HPPR-PVA aqueous systems displayed two liquid phases at a high concentration and molecular weight of PVA. This result was consistent with the prediction of the Flory-Huggins lattice model. On the contrary, the HPPR-PVA-DMSO system exhibited only a single phase. The HPPR-PVA blend gels crosslinked in dimethylsulfoxide (DMSO) were highly transparent over a wide concentration range, while the gels prepared in water were opaque at high polymer concentrations. Spherical domains were observed in the opaque gels by laser scanning confocal microscopy, and the sizes of the domains were significantly dependent on the amount of cross-linking reagent utilized. These results indicated that the transparency of the HPPR-PVA blend gels was strongly affected by the competition between the liquid-liquid two-phase separation and the crosslinking HPPR and PVA polymers during the preparation of the blend gels.

元の言語English
ページ(範囲)270-276
ページ数7
ジャーナルColloids and Surfaces B: Biointerfaces
56
発行部数1-2
DOI
出版物ステータスPublished - 2007 4 15
外部発表Yes

ASJC Scopus subject areas

  • Biotechnology
  • Surfaces and Interfaces
  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry

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