Abstract
We describe a new method for synthesis of phase-separated multilayer core–shell emulsion particles with different morphologies, such as multilayer inverse core–shell (MLICS) particles and multilayer sea-island core–shell (MLSICS) particles. These emulsion particles were prepared by three-stage semicontinuous polymerization with changing addition methods of divinylbenzene (DVB) as a crosslinking agent. The multilayer core–shell morphologies of the various particles were clearly shown in transmission electron microscopy (TEM), as well as average diameters and distributions of particles during multistage polymerization were characterized by dynamic laser scattering (DLS) method. Furthermore, the effect of DVB on particle morphology was discussed in more detail. Considering the inhibitory effect of polymer networks on chain migration, multilayer core–shell particles with various defined morphologies and different functional groups can be synthesized in shell layer by introducing crosslinking structure during emulsion polymerization.
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