The Effect of Functional Groups of Polymers on Dispersion of TiO₂ in Nonpolar Solvent

Abstract

Dispersion of TiO₂ particles in methylcyclohexane was investigated through adsorption of polymers with various functional groups. The amount of adsorbed polymer was dependent on the kind of functional groups : The large amounts of adsorbed polymer perfectly covered the polar particle surfaces to form a thick adsorbed layer. The dispersions which had large amounts of adsorbed polymer were found to be more stable from the measurements of the rheological properties, the gloss, and the sedimentation rate.
It was confirmed that the adsorbed polymer layer played an important role to enhance dispersion stability and the polymer functional groups provided a significant effect.