CH1012
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3
RHEOLOGY
Rheology - the science concerned with the flow and / or deformation of matter.
eg. viscosity (flows / ceases - simple liquids)
Colloidal systems
• Viscosity higher than the pure medium due to hydrodynamic (finite particle volume in liquid) & interparticle (attr., rep., contact) effects.
• in high concentration colloids the viscosity may change with the strength and rate of the applied shearing stress (Force/area)
eg. non-drip paints - to stir quickly is
  hard, stir slowly no problems.