Іnvestigation of complex formation of cobalt (ІІ) ions with polyacrylic acid
The process of formation of cobalt (II) ion complexes with polyacrylic acid, their influence on the size of the tangle of polyacrylic acid macromolecules and the concentration of monomer units in it have been studied. It is shown that the reaction at a temperature of 20–300 ºC forms a complex in which the cobalt ion binds two carboxyl groups of polyacrylic acid. Binding of the third carboxyl group to the complex is prevented by a sufficiently flexible polyacrylic acid chain. Increasing the temperature significantly increases the flexibility of the polyacrylic acid chain.