Abstract Various diphenylzinc–additive systems were used to initiate homopolymerization of styrene and of methyl methacrylate. The polymers obtained were characterized by size exclusion chromatography, by 1 H– and 13 C–NMR and measurements of intrinsic viscosities [η]. These data indicated that polymerization is much influenced by: The nature of the additive employed, the proportion of the additive relative to diphenylzinc and the condition of polymerization.
