RHEOLOGICAL PROPERTIES OF ALUMINA-POLYACRYLATE GEL DISPERSIONS

Rheological properties of aqueous alumina-polyacrylate gel dispersions have been investigated with a controlled stress rheometer as function s of both cross-linked polyacrylate and alumina concentrations at pH 1 3. These studies were conducted to understand the role of alumina-poly acrylate interactions in building the theology of complex liquids that contain surfactants, sodium hypochlorite, alkali, and inorganic salts . Viscosity and viscoelasticity of polyacrylate gel dispersions can be enhanced by the addition of colloidal alumina. The trends in viscosit y and viscoelasticity are explained on the basis of changes in the con formation of polyacrylate and repulsive interactions of negatively cha rged polyacrylate and alumina particles.