Abstract
Polyoxetane resins, IVa and IVb, anchoring the hydroxamic acid residue were prepared with high degree of functionality (DF) by polymer reactions from aliphatic NH2 groups at pendant spacer-ends of IIa and IIb. The pendant hydroxamic acids adsorbed Cu(II) ions from aqueous solution of Cu(II) acetate at pH 6 to show capacity beyond that calculated for the ordinary Cu(II)-complex chelated with the two pendant ligands, probably due to the formation of uncompleted chelate structures. The corresponding aromatic NH2 groups of IIc and IId showed very low DF in the same polymer reactions. At pH 6, amines of IIc and IId adsorbed Cu(II) ions to a certain extent, although those of IIa and IIb could adsorb no Cu(II) ions. A soft, expansible polyoxetane network, as a supporting matrix, may importantly affect Cu(II)-adsorption at high capacity.
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Xu, YH., Ogawa, H., Kanoh, S. et al. Preparation and Characterization of Polyoxetane Resins Anchoring the Pendant Spacer-Separated Hydroxamic Acid Residue. Polym J 31, 143–149 (1999). https://doi.org/10.1295/polymj.31.143
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DOI: https://doi.org/10.1295/polymj.31.143