Copolymerization of Styrene and Methyl Methacrylate in Ternary Oil-in-Water Microemulsions: Comments on a Paper by Gan et al

Exptl. data presented by L.M. Gan et al. are reinterpreted with the use of the error-in-variables method. The recalcd. reactivity ratios in microemulsion hardly deviate from earlier reported bulk copolymn. values. Furthermore it is shown that monomer sequence distribution as a function of copolymer compn. is equally well described by bulk reactivity ratios as it is by microemulsion reactivity ratios. This can easily be explained from the fact that the relation between monomer sequence distribution and copolymer compn. is governed by the reactivity ratio product, rather than by the sep. reactivity ratios. It is found that the reactivity ratio product in microemulsion does not significantly deviate from that in bulk