polyacrylic acid

The article presents the results of the study of the processes of intermolecular interaction and complexation in multicomponent aqueous systems based on polyvinylpyrrolidone (PVP) and functionally active water-soluble polymers: polyvinyl alcohol, polyethylene glycol, and polyacrylic acid. The effect of the presence of the monomer 2-hydroxyethyl methacrylate on the electro-physical properties of the mixtures was studied.

The article presents the results of a study on the electrical conductivity of aqueous solutions of water-soluble polymers, including polyvinylpyrrolidone, polyvinyl alcohol, polyethylene glycol, and polyacrylic acid, as well as their binary mixtures and polymer solutions in the presence of the monomer 2-hydroxyethyl methacrylate. The primary focus is placed on the influence of the nature and concentration of the polymers, as well as the component ratios in the solutions, on their electrical conductivity.

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.

Organic-inorganic hydrophilic composites based on sodium polyacrylate (PAANa) and poly-N-(2-aminoethyl)-3-aminopropyltrimethoxysilane (PAPTMS) showed the improved swelling capacity at incorporation of PAPTMS. Changing of non-Fickian to Super case II swelling behaviour is observed at 20 wt % PAPTMS content. Enhancing of thermal stability and heat-resistance index of composite hydrogels compared to PAA is shown.

This paper is devoted to study of sorption properties (sorption degree, polymer chain binding degree) of intergel system hydrogel of polyacrylic acid (hPAA) – hydrogel of poly-4-vinylpyridine (hP4VP) in relation to neodymium and praseodymium ions. It was found that remote interaction of the polymers in intergel pairs provides significant changes of the electrochemical and volume gravimetric properties. Strong increase of the swelling degree of hPAA is observed at the ratio 17%hPAA-83%hP4VP; significant increase of swelling degree of hP4VP is observed at the ratio 83%hPAA-17%hP4VP.