Homopolymerization of methyl methacrylate (MMA) was carried out in the presence of triphenylstibonium 1,2,3,4-tetraphenyl-cyclopentadienylide as an initiator in dioxane at 65°C ± 0⋅1°C. The system follows non-ideal radical kinetics (R p ∝ [M] 1⋅4 [I] 0⋅44) due to primary radical termination as well as degradative chain-transfer reaction. The overall activation energy and average value of k p 2 /k t were 64 kJ mol-1 and 0⋅173 × 10-3 l mol-1 s-1 respectively.

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