Studies on the States of Water and Sodium Ions in Poly(N-isopropylacrylamide)Gel
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概要
- 論文の詳細を見る
The state of water and sodium ions in poly(N-isopropylacrylamide)gel were studied by differential scanning calorimetry(DSC), and ^1H and ^<23>Na NMR. The motional state of water in the gel is restricted at the phase transition point. DSC and ^1H NMR suggest that the associated water is considered to be transformed into nonfreezing water on increasing the volume fraction of the polymer. ^<23>Na NMR indicates that the sodium environment is distorted at higher temperatures, leading to an increase for the bound values of both linewidth and chemical shift, which is consistent with the finding that the introduction of Na^+ ions into a hydrated gel system increases the amount of nonfreezing water.
- 社団法人応用物理学会の論文
- 2000-12-15
著者
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Annaka Masahiko
Department Of Chemistry Kyushu University
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Annaka Masahiko
Department Of Materials Technology Faculty Of Engineering Chiba University
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Nakahira Takayuki
Department Of Materials Technology Chiba University
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Nakahira Takayuki
Department Of Materials Technology Faculty Of Engineering Chiba University
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MOTOKAWA Keiko
Department of Materials Technology, Faculty of Engineering, Chiba University
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Motokawa Keiko
Department Of Materials Technology Faculty Of Engineering Chiba University:(present Address)chugai P
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Nakahira Takayuki
Department of Applied Chemistry, Faculty of Engineering Chiba University
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Annaka Masahiko
Department of Applied Chemistry, Faculty of Science and Technology, Keio University
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