142 Advances in Polymer Science Editorial Board: A. Abe. A.-C ...

Poly(macromonomers), Homo- and Copolymerization 163
6.2
Mechanistic Model of Dispersion Copolymerization with Macromonomers
According to the aggregative and coagulative nucleation mechanisms which
have been derived originally from the homogeneous nucleation theory of Fitch
and Tsai [128], the most important point in the reaction is the instant at which
colloidally stabilized particles form. After this point, coagulation between similar-sized
particles no longer occurs, and the number of particles present in the
reaction is constant. As shown in Fig. 6, the dispersion copolymerization with
macromonomers is considered to proceed as follows. (1) Before polymerization,
the monomer, macromonomer, and initiator dissolve completely into the
Fig. 6. Schematic model for the particle nucleation and growth of sterically stabilized particles
in dispersion polymerization using macromonomer