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Effect of Ni(II), Cd(II), and Cu(II) metal ions on the crystallinity of poly(maleic anhydride-alt-acrylic acid)

机译:Ni(II),Cd(II)和Cu(II)金属离子对聚马来酸酐-丙烯酸盐-丙烯酸的结晶度的影响

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摘要

The chelation of poly(maleic anhydride-alt-acrylic acid) [poly(MA-alt-AA)] with nickel (II), cadmium (II), and copper (II) ions was carried out under various pH conditions. Polychelates were prepared by precipitation from the aqueous solutions of metal salts at different pH values. The effects of metal salts (NiCl2.6H(2)O, CdCl2.2H(2)O, CuCl2.2H(2)O) on the degree of crystallinity of poly(MA-alt-AA) were investigated by X-ray diffraction spectroscopy at different pH values. The degree of crystallinity was found to be in the following order: Cd(II)-polychelate > Cu(II)-polychelate > Ni(II)-polychelate at pH 6.36; this result was also supported by gravimetric studies. (C) 2003 Wiley Periodicals, Inc. [References: 12]
机译:聚(马来酸酐-丙烯酸-丙烯酸)[聚(MA-alt-AA)]与镍(II),镉(II)和铜(II)离子的螯合在各种pH条件下进行。通过在不同的pH值下从金属盐的水溶液中沉淀来制备聚螯合物。通过X射线研究了金属盐(NiCl2.6H(2)O,CdCl2.2H(2)O,CuCl2.2H(2)O)对聚(MA-alt-AA)结晶度的影响在不同pH值下的衍射光谱。发现结晶度按以下顺序:Cd(II)-多螯合物> Cu(II)-多螯合物> Ni(II)-多螯合物在pH 6.36;重量分析研究也支持这一结果。 (C)2003 Wiley Periodicals,Inc. [参考:12]

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