Quasi-hard Sphere Dispersions

Figure 5.5 The dynamic viscosity for a quasi-hard sphere dispersion from the data of Mellema et al.13 The frequency has been normalised to the diffusion time for two different particle radii. The volume fraction is

Figure 5.6 The quasi-hard sphere diffusion data of Ottewill and Williams14 as a function of volume fraction. The long (DL) and short (Ds) time tracer diffusion coefficients are shown (symbols). The dotted line is representative of the relative fluidity of a hard sphere dispersion...

The expressions used for dispersions of quasi-hard spheres are usually measured on systems with a chemically grafted layer. This layer is chosen such that it is rigid and bristle-like in form. The idea is that this layer is... 

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