Rheological Properties of Monodisperse Latex

Abstract

Steady flow properties of the ordered monodisperse polystyrene latex have been measured. The ordered latex has a yield stress of about 1 dyne/cm² and the yield stress σ is related to the rigidity G as σ=1.7×10^-3G. These facts suggest that the ordered monodisperse latex is a “crystal” which undergoes a plastic deformation by the same mechanism as the ordinary crystals. The salt concentration dependence of the steady flow viscosity in the disordered latex is also discussed.