Phase Transition of a Polymer Gel in Pure and Mixed Solvent Media
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概要
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A volume phase transition of poly-N-isopropylacrylamide (NIPA) gel immersed insome pure and mixed solvents has been investigated experimentally. A slightly discon-tinuous transition of NIPA get in water changed to a more distinctly first-order transiLion on adding a small amount (<20%) of alcohols to water. As the concentration ofalcohols in the mixed solvent increased further, the volume transition blurred andeventually disappeared. Analyzing the experimental results on the basis of the meanfield theory of polymer solution, it has been showtt that the polymer-solvent interac-lion parameter 7 exhibits a drastic change at the volume transitions. This indicatesthat the enthalpy and entropy of solution depend strongly on jvolymer concentration.
- 社団法人日本物理学会の論文
- 1987-01-15
著者
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Hirotsu Shunsuke
Department of Biological Sciences, Faculty of Bioscience and Biotechnology, Tokyo Institute of Techn
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Hirotsu Shunsuke
Department Of Biological Sciences Faculty Of Bioscience And Biotechnology Tokyo Institute Of Technol
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HIROTSU Shunsuke
Department of Physics,College of Science,Tokyo Institute of Technology
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