alpha-methylstyrene-methyl methacrylate emulsion copolymerizations have been investigated at various temperatures (60, 70, 85 degrees C) on the whole composition range. The kinetic behavior has been studied, such as conversion, particle size, and the average number of radicals per particle ((n) over tilde), as well as the following characteristics of the copolymers: composition, microstructure, molecular weights (MWD), and glass transition temperature (T-g). One of the main results is the possibility to synthesize stable copolymers with high T-g (i.e., 132-140 degrees C).