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Photoinitiated RAFT Dispersion Polymerization: A Straightforward Approach toward Highly Monodisperse Functional Microspheres
A straightforward dispersion polymerization procedure
for the synthesis
of monodisperse functional polymeric microspheres is proposed in this
article. This method overcomes the problems deriving from the highly
sensitive nucleation stage by introducing both photoinitiation and
a RAFT chain transfer agent to the reaction. The process of the formation
and growth of particles in the procedure was investigated and found
to be quite different from that in a traditional dispersion polymerization.
Various kinds of PMMA-based functional microspheres with high size
uniformity were synthesized in a single step by this strategy. The
microspheres remained uniform in size, even at concentrations of cross-linker
or functional comonomer up to 10 wt %