ESR studies of the adsorption behavior of styrene-methyl methacrylate copolymer at the solid-liquid interface.
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概要
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The conformation of the copolymer of styrene and spin-labeled methyl methacrylate adsorbed on nonporous silica from solution was investigated by the use of the ESR method. The attached segment fraction of methyl methacrylate, <I>P</I><SUB>MMA</SUB>, in the copolymer was evaluated experimentally. The attached segment fraction of styrene, <I>P</I><SUB>ST</SUB>, and the total attached segment fraction, <I>P</I><SUB>TOT</SUB>, in the copolymer were estimated by means of numerical calculations from the value of <I>P<SUB>MMA</SUB></I>. The amounts of saturated adsorption, <I>A</I><SUB>S</SUB>, were obtained as a function of the mole fraction of styrene in the copolymer. The <I>A</I><SUB>S</SUB> values of the copolymers through the mole fractions of styrene of 0.8 increased slightly with the mole fraction of styrene. The <I>A</I><SUB>S</SUB> values of the copolymers at the mole fractions of styrene in excess of 0.8 decreased steeply to that of the styrene homopolymer. The change in the <I>A</I><SUB>S</SUB> values of the copolymers was explicable in terms of the changes in the values of the surface coverage and the values of <I>P</I><SUB>TOT</SUB>. The adsorbed methyl methacrylate homopolymer had a flat conformation, whereas the adsorbed styrene homopolymer had a loopy conformation. When the styrene content in the copolymer increased, the adsorbed conformations of the copolymers varied gradually from the conformation of the methyl methacrylate homopolymer to that of the styrene homopolymer.
- 公益社団法人 日本化学会の論文
著者
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KOBAYASHI Kazutoshi
Department of Communications and Computer Engineering, Graduate School of Informatics, Kyoto Univers
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Araki Kazuo
Department Of Electronics Faculty Of Engineering Kyoto University
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Imamura Yoshio
Department of Applied Chemistry, Faculty of Science, Science University of Tokyo
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Endo Ryuichi
Department of Applied Chemistry, Faculty of Science, Science University of Tokyo
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Araki Kazuo
Department of Chemistry, Faculty of Science, Science University of Tokyo
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Araki Kazuo
Department of Applied Chemistry, Faculty of Science, Science University of Tokyo
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Endo Ryuichi
Department of Chemistry, Faculty of Science, Science University of Tokyo
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Kobayashi Kazutoshi
Department of Chemistry, Faculty of Science, Science University of Tokyo
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Kobayashi Kazutoshi
Department of Applied Chemistry, Faculty of Science, Science University of Tokyo
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