AbstractThe copolymerization reaction of five vinyl esters of aliphatic acids with vinyl chloride, vinylidene chloride, acrylonitrile, butadiene, styrene, and methyl acrylate have been studied. The reactivity ratios have been determined and theQandevalues for the esters have been calculated. The results clearly show that the nature of the acyl residue in a vinyl ester has little influence on its reactivity ratio in a copolymerization reaction or on theQorevalue.