Adsorption of poly(methyl methacrylate) on silica surfaces having various silanol densities.
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概要
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The adsorption of poly(methyl methacrylate) (PMMA) on silica surfaces having various silanol densities was studied by ESR and IR spectroscopies. Three silica samples, Nipsil HD, Aerosil 300, and Aerosil R812, which have 8, 2.2, and 0.54 nm<SUP>−2</SUP> silanol densities, respectively, were used as the adsorbents. The amount of adsorption, <I>A</I>, the surface coverage, θ, and the fraction of train segments in the polymer, <I>p</I>, were determined. The values of the segment fractions anchoring through the hydrogen bond in all train segments of the adsorbed polymer, <I>f</I><SUB>HB</SUB>, were also estimated. When PMMA adsorbed on Nipsil HD, the polymer adsorbed predominantly by the formation of hydrogen bonds; on the other hand, when PMMA adsorbed on Aerosil 300, the polymer adsorbed through the hydrogen bond in the part of 30–40%. When PMMA adsorbed onto Nipsil HD, the value of <I>p</I><SUB>ESR</SUB> obtained by the ESR method was almost the same as the <I>p</I><SUB>IR</SUB> obtained by the IR method. When PMMA adsorbed onto Aerosil 300, the value of <I>p</I><SUB>ESR</SUB> was 0.47, twice the value of <I>p</I><SUB>IR</SUB>(0.24).
- 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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Imamura Yoshio
Department of Applied 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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Kobayashi Kazutoshi
Department of Applied Chemistry, Faculty of Science, Science University of Tokyo
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