Conformation of Adsorbed Polymeric Chain. III
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概要
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Average properties of a copolymeric chain in which <I>a</I> segments of the kind A and <I>b</I> segments of the kind B occur alternatively are calculated for an infinite chain length. For the simplest case of <I>a</I>=<I>b</I>=1, <I>i.e.</I> an alternating copolymeric chain (–A–B–)<I><SUB>N</SUB></I>, the average number of adsorbed segments of A, \barν<I><SUB>A</SUB></I>, that of B, \barν<I><SUB>B</SUB></I> and the mean square end-to-end distance \bar<I>r</I><SUP>2</SUP> are computed numerically as functions of the adsorption energies ε<I><SUB>A</SUB></I> and ε<I><SUB>B</SUB></I>. The values of \barν<I><SUB>A</SUB></I>, \barν<I><SUB>B</SUB></I>, and \bar<I>r</I><SUP>2</SUP> are proportional to <I>N</I> for larger values of η<I><SUB>A</SUB></I> (=exp(ε<I><SUB>A</SUB></I>⁄<I>kT</I>)) than the critical value (η<I><SUB>A</SUB></I>)<I><SUB>c</SUB></I> at fixed η<I><SUB>B</SUB></I>, as found for the case of a homogeneous polymeric chain. It is seen that the behavior of the copolymeric chain near an interface is affected distinctively by the adsorption energies of the segments A and B, and the copolymeric chain is forced to adsorb even for a fairly low adsorption energy of the segment of one kind if the adsorption energy of the segment of the other kind is sufficiently large.
- 公益社団法人 日本化学会の論文
著者
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Motomura Kinsi
Department Of Chemistry Faculty Of Science Kyushu University
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Matuura Ryohei
Department of Chemistry Faculty of Science Kyushu University
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Sekita Koju
Department of Chemistry, Faculty of Science, Kyushu University
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