Study of complex formation copper (II) ions with polyacrylic acid

L. Oliynyk
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Abstract

The process of interaction of copper ions with polyacrylic acid is investigated in this paper.It is shown that complexes are formed by the interaction of polyacrylic acid with copper ions (II) in a wide range of pH.At pH <4 the precipitate of complexes falls, the pH of the solution increases, water-soluble copper complexes (II) with polyacrylic acid are formed.The solubility of such complexes depends on the number of ionized carboxyl groups of the macromolecule.At low concentrations of copper ions (II) in the mixture, complexes associated with two carboxyl groups of polyacids are formed.At high concentrations of copper ions(ІІ), one ion of copper (II) binds only one carboxyl group and hydroxocomplex copper (II) is formed.It was established that the viscosity of aqueous solutions of polyacrylic acid decreases with an increase in the concentration of copper ions (II) due to the formation of complexes between them.The influence of the pH of the solution, the concentration of polyacrylic acid and copper ions (II) in the solution on the amount of bound copper during the formation of copper salt sediment with polyacids is shown.
聚丙烯酸络合形成铜(II)离子的研究
研究了铜离子与聚丙烯酸的相互作用过程。结果表明,在较宽的pH范围内,聚丙烯酸与铜离子(II)相互作用形成配合物。当pH <4时,配合物沉淀下降,溶液pH增大,与聚丙烯酸形成水溶性铜配合物(II)。这种配合物的溶解度取决于大分子中游离羧基的数目。在低浓度的铜离子(II)混合物中,与两个羧基聚酸相关的配合物形成。在高浓度铜离子(ІІ)下,一个铜离子(II)只与一个羧基结合,形成羟基配合物铜(II)。结果表明,随着铜离子(II)浓度的增加,聚丙烯酸水溶液的粘度随着铜离子(II)之间形成络合物而降低。研究了溶液pH值、聚丙烯酸浓度和溶液中铜离子(II)浓度对聚酸形成铜盐沉积过程中结合铜量的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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