An extreme dependence of pH, specific electrical conductivity, viscosity of carboxymethylcellulose sodium salt
with xymedone (1-(?-oxyethyl)-4,6-dimethyl-1,2-dihydro-2-oxopyrimidine) in an aqueous medium on xymedone
concentration has been found.
According to 13С NMR spectra, xymedone reacts in an aqueous medium with polyacrylic acid and binds the protons
resulting from the dissociation of polyacrylic acid, which leads to an increase in pH and a decrease in specific
conductivity. It is shown that the interaction of xymedone with polyacrylic acid is similar to the ligand absorption by
biopolymers and may be described in the approximation of the Scatchard theory.
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