The study of interactions between textile auxiliary polyelectrolytes by isothermal titration calorimetry

Abstract

• Interactions between cationic and anionic polyelectrolytes. • Thermodynamic characteristics of micellization. • Isothermal titration calorimetry study. The interactions between the cationic polyelectrolyte poly(dimethyldiallyl ammonium chloride) (VPK-402, PDADMAC) and the anionic polyelectrolyte Acremon B-1 (Ac), widely used as auxiliary materials in the textile industry, as well as Ac aggregation have been studied by isothermal titration calorimetry. The thermodynamic characteristics of Ac micelle formation and of interpolyelectrolyte complex formation between Ac and VPK-402 have been obtained in an aqueous solution at 298.15 K. It has been revealed that the entropy factor was favorable to the Ac micellization process. It has been found that at a low concentration of Ac in a solution, the interaction between Ac and VPK-402 was also controlled by the entropy contribution. On the contrary, the formation of Ac – VPK-402 interpolyelectrolyte complexes at high Ac concentrations was enthalpycally favorable.