Abstract
The dispersion copolymerization of methacryloyl terminated polyoxyethylene (PEO-MA) macromonomer and butyl acrylate (BA) initiated by an oil-soluble initiator 2,2'-azobisisobutyronitrile (AIBN) was investigated at 60 °C. The rate of polymerization and the number of particles were found to increase with increasing initiator concentration. The maximum rate of polymerization or the rate per particle was found to be proportional to the 0.7th or 0.36th power of [AIBN]. The molecular weight was found to be nearly independent of initiator concentration. The number of particles increases up to 50% conversion. The particle growth is suggested to proceed via association of particles and by propagation within particles.
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