Summary
The swelling behavior of poly(N-isopropylacrylamide) (PNIPA) hydrogels in aqueous solution of poly(ethy1ene glycol) (PEG) and the partition parameter of PEG between the gel and the external solution were investigated. The molecular weight of PEG, the ionic group content of the hydrogels and the swelling temperature were taken as the independent variables. Several types of volume phase transitions such as swelling, deswelling and reentrant phase transitions were observed depending on the external parameters. The results were explained in terms of the theory of equilibrium swelling.
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Received: 31 May 2002/Revised version: 5 August 20021 Accepted:5 August 2002
Correspondence to Oguz Okay E-mail: okayo @itu.edu.tr, Fax: 02 12-2856386
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Melekaslan, D., Okay, O. Temperature dependent swelling behavior of ionic poly(N-isopropylacrylamide) gels in PEG solutions. Polymer Bulletin 49, 181–188 (2002). https://doi.org/10.1007/s00289-002-0085-0
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DOI: https://doi.org/10.1007/s00289-002-0085-0