Depleted-zone core-shell

Figure 2. Two morphological models used to describe the origin of the ionic SAXS maximum observed for Nafion (a) the modified hard-sphere model depicting interparticle scattering and (b) the depleted-zone core—shell model depicting intraparticle scattering. (Adapted with permission from ref 36. Copyright 1981 American Chemical Society.)...

Another example of the depletion zone relates to the core-shell effects in the synthesis of latexes (63). Consider a partly polymerized latex. The remaining monomer may be the same or different from the already formed polymer. Many such systems have most of the polymer in the interior, and most of the monomer near the surface, because the polymer avoids the aqueous interface. A requirement is that the latex particle be larger than the end-to-end distance of the polymer chains already formed. This requirement is usually met. This has two consequences ... 

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