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Aggregation of Partially Quarternized Poly(4-vinylpyridine) with Anionic Surfactant Sodium Dodecvl Sulfate  

김용철 (금오공과대학교 고분자공학과)
박일현 (금오공과대학교 고분자공학과)
심후식 (금오공과대학교 고분자공학과)
최이준 (금오공과대학교 고분자공학과)
Publication Information
Polymer(Korea) / v.28, no.2, 2004 , pp. 154-161 More about this Journal
Abstract
Modified poly(4-vinylpyridine) was obtained by partial quarternization of nitrogen atoms in pyridine rings of poly(4-vinylpyridine) with methyl group. By means of laser light scattering and fluorescence, it was found that this modified polymer chains were aggregated in the aqueous solution and its structure was core-shell type. The hydrophobic parts of the chains were densely condensed in core part and the hydrophilic part of quarternized amino with positive charge formed the shell part. In the mixed system of modified poly(4-vinylpyridine) and anionic surfactant, sodium dodecyl sulfate, it was observed that a critical aggregation concentration existed and that this critical concentration was suddenly decreased above 0.1 M NaCl. The size change of aggregates was also investigated by dynamic light scattering while sodium dodecyl sulfate was added into polymer solution upto the critical aggregation concentration.
Keywords
quarternized poly(4-vinylpyridine); sodium dodecyl sulfate; critical aggregation concentration; hydrophobic interaction; dynamic light scattering;
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