Reactivity ratios in group transfer copolymerization of methyl methacrylate/ethyl methacrylate and methacrylonitrile/methyl methacrylate systems obtained by semi‐integral and integral methods

Abstract

AbstractThe monomer reactivity ratios for the methyl methacrylate/ethyl methacrylate (MMA/EMA) and methacrylonitrile/methyl methacrylate (MAN/MMA) systems are calculated by linearized semi‐integral and nonlinear fully integral methods. For the MMA/EMA system, rMMA values obtained by various methods are between 1.24 and 1.25 and rEMA values between 0.30 and 0.34. For MAN/MMA system, rMAN values are between 3.2 and 3.8 and for rMMA an upper bound can be determined, i.e., rMMA<0.05. The results show that previous values obtained by the linearized method (the initial Kelen‐Tüdős method) overestimate the reactivity of the less active monomer.