Being different from other dispersion polymerizations which use nonpolar fatty hydrocarbons or methanol-water as media

this article present the preparation of poly(methyl methacrylate) particles in alcohol-watermixture．In experiments

a certain heating way is applied：at first

the reaction occurs at a relatively high temperature for a given time；then the temperature is lowed and the reaction continues at that temperature to the end．This procedure results in a largely narrowed size distribution. The effects of initiator on the particle size and size distribution are also studied．It is found that even a small amount of KPS can decrease the size of particles and broaden the size distribution apparently.