The Interaction of Polymer Ions with Counterions. II. Polymethacrylates

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概要

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• The equivalent conductivities and the electrophoretic mobilities of sodium, tetramethyl-, tetraethyl-, and tetrabutyl- ammonium salts of polymethacrylic acid (PMA) in 0.05 M solutions of the simple salts of the corresponding cations are measured at 25°C, and the results obtained are interpreted in terms of the counterion binding. The calculated values of the apparent degree of ionization for sodium, tetramethyl-, and tetraethylammonium salts of PMA are found to be larger than those of the corresponding salts of polyacrylic acid (PAA), indicating that the methyl groups in PMA generally hinder the binding of counterions with polyions. With tetrabutylammonium salt of PMA, the apparent degree of ionization is nearly equal to that of the tetrabutylammonium salt of PAA. This fact suggests hydrophobic interaction between the methyl groups in PMA and tetrabutylammonium ions.

• 公益社団法人 日本化学会の論文

著者

• Horiuchi Teruo

  Department of Chemistry, Yokohama City University

• Tamaki Kunio

  Department of Chemistry, Yokohama City University

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