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Radical copolymerization of fullerene (C 60 ) and n-butyl methacrylate (BMA) has been carried out using triphenylbismuthonium ylide as an initiator at 70 • C for 4 h in a dilatometer under nitrogen atmosphere. The kinetic expression of the polymerization is R p α [Ylide] 0.5 [C 60 ] −1.0 [BMA] 1.2 , which is similar to that expected for ideal kinetics. The rate of polymerization increases with an increase in the concentration of initiator and BMA. However, it decreases with an increase in the concentration of fullerene. Fullerene acts as radical scavengers causing retardation in polymerization.