  Macrocellular silicone polymers are obtained after solidification of the
continuous phase of a PDMS (polydimethylsiloxane) emulsion, which contains PEG
(polyethylene glycol) drops of sub-millimetric dimensions. Coalescence of the
liquid template emulsion is prohibited by a reactive blending approach. We
investigate in detail the relationship between the interfacial properties and
the emulsion stability, and we use micro- and millifluidic techniques to
generation macro-cellular polymers with controlled structural properties over a
wider range of cell-sizes (0.2-2mm) and volume fractions of the continuous
phase (0.1-40%). This approach could easily be transferred to a wide range of
polymeric systems.
