Fig. 3. (a) Kinetic plots for polymerization of MA in benzene at ambient temperature with [MA]₀ = 1.0 M, [MA]₀/[I]₀ = 600/1. (A): t = 13.6 h, conv. = 42%, M _n,GPC = 20 300, M _w/M _n = 1.07. (B): t = 13.5 h, conv. = 45%, M _n,GPC = 26 100, M _w/M _n = 1.06. (C): addition of 1 equivalent of TPO, t = 4.5 h, conv. = 58%, M _n,GPC = 28 500, M _w/M _n = 1.12. (b) Evolution of molar mass and polydispersity with conversion under different conditions.