Abstract
Sulfur atom-containing functional groups were introduced into poly (styrene-g-ethylenimine) (PSt-g-EI) consisting of a cross-linked polystyrene backbone and linear polyethylenimine branches by reactions with ethylene sulfide (ES) and with carbon disulfide which produced new chelating resins of the aminoethylmercaptan type (AEM) and diethyldithiocarbamate type (DTC), respectively. In the mercaptoethylation of PS-g-EI with ES, the amount of sulfur atom in the SH group was about 65% for all sulfur atoms introduced and the SH group in the polymer was more stable toward oxidation in the atmosphere than monomeric aminomercaptans. AEM was found to form stable complexes with heavy metal ions and quite effective for the adsorption of Hg2+. The Cu(II) complex with AEM was pale yellow in acidic and blue in nonacidic media. The extent of dithiocarboxylation with carbon disulfide was about 66%. DTC was less stable in acidic media, whereas the Cu(II) complex was not readily decomposed with 1N-HCl. The order of the adsorption capacities of these three resins was PS-g-EI>AEM>DTC.
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Saegusa, T., Kobayashi, S., Hayashi, K. et al. Preparation and Chelating Properties of Mercaptoethylated and Dithiocarboxylated Poly(styrene-g-ethylenimine)s. Polym J 10, 403–408 (1978). https://doi.org/10.1295/polymj.10.403
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DOI: https://doi.org/10.1295/polymj.10.403
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