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  3. Volume 6, Number 1
  4. Study of complex formation copper (II) ions with polyacrylic acid

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

CTAS.
2023;
, Number 1
: 1-7
https://doi.org/10.23939/ctas2023.01.001
Authors:
  1. Lilianna Oliynyk
1
Lviv Polytechnic National University

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.

complexes
polyacrylic acid
polyacids
copper ions (II)
carboxyl-containing polymers
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