Features of the rheological behavior of aqueous solutions of alumino-, aluminoboro- and aluminochromophosphates

Rheological studies carried out using rotational rheometer in the rotational and oscillatory modes at different temperatures and heating/cooling conditions revealed that the aqueous solutions of alumino-, aluminoboro- and aluminochromophosphates presented an unusual behavior. The largest increase in the viscosity of the studied systems was determined between 20 and 60 °C and was attributed to the formation of thermo-reversible inorganic gels in solutions of aluminophosphates due to interionic association. At the same time, the oscillation mode was found to be more sensitive to the process of polymer gel formation compared to the rotation mode. In addition, the process of polymer gel formation was more adequately studied from dynamic tests. [Display omitted]