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Quantitative analysis on swelling behavior of ionic gels in the mixed solvents

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Abstract

Phase transition was observed in HSMA/PVA IPN gels having ionizable groups with 3-dimensional network structure in the mixed solvents such as water-methanol. water-acetone or water-ethanol. In order to analyze this phenomena quantitatively, two adjustable parameters related to gel properties were determined from the model based on Tanaka theory. One was the number of dissociated counterions per effective chain (f). the other was the interaction parameters (xjj) between gel and water. As increasing the composition of water, swelling of the gels occurs in the mixed solvent; the gel was shrunk instead when the water content was decreased, which was reversible regardless of the path of swelling and shrinking. A degree of swelling or shrinking of the gel was dependent upon theseX ijand f of the gel. With smallerX n and larger f. more rapid phase transition was observed. Additionally, swelling and shrinking behavior of the gel in system of two solvents and one polymer was influenced not only byx ij between gel and solvents but also by xij between two solvents.

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Authors and Affiliations

  1. Department of Chemical Engineering, Korea Advanced Institute of Science and Technology, 373–1 Kusong-dong, Yusong-gu, 305–701, Taejon, Korea

    O Ok Park, Won Sang Lee, Yum Rak Oh & Yang-Kyoo Han

  2. Polymer Chemistry Laboratory, Korea Institute of Science and Technology, Cheongryang, P.O. Box 131, 130–650, Seoul, Korea

    Yang-Kyoo Han

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  1. O Ok Park
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  2. Won Sang Lee
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  3. Yum Rak Oh
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  4. Yang-Kyoo Han
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Park, O.O., Lee, W.S., Oh, Y.R. et al. Quantitative analysis on swelling behavior of ionic gels in the mixed solvents. Korean J. Chem. Eng. 11, 96–103 (1994). https://doi.org/10.1007/BF02697361

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  • DOI: https://doi.org/10.1007/BF02697361

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