Butyl acrylate (BA), methyl methacrylate (MMA), and alpha methyl styrene (AMS) copolymerizations have been systematically investigated over a range of temperatures from 60 to 140degreesC. Low conversion copolymerizations elucidated how copolymer composition varied with feed composition in bulk and solution. From these data, a number of models were considered to determine reactivity ratios and the extent of monomer depropagation for the different systems. Subsequently, full conversion range polymerizations examined rate and copolymer composition profiles for the different monomer pairings.