Different stability systems in suspension polymerization of methyl methacrylate

Suspension polymerization was used to prepare poly methyl methacrylate microspheres. The type of primary stability systems influences the properties of the final microcapsules. In this research, their impact on stability time, molecular weight, and particle size and glass transition temperatures has been studied. The stability systems containing inorganicsuspending agents represent higher stability time. Presence of polymeric stabilizer such as PVA helped to formation ofmore separated microcapsules. DLS analysis showed that particle size decreased as polymeric stabilizer increased. According to GPC results, an increase in PVA amount leaded to an increment in weight average of molecular weight. Also DSC analysis represented an increase in Tg in microspheres prepared in presence of TCP compared to DSHP

Keywords:

PMMA , Suspension polymerization , Stability System , particle size , molecular weight