The radical copolymerization of monocyclic terpene namely limonene with butyl methacrylate in xylene at 80+/-0.1degreesC for 50 min, using benzoylperoxide (BPO) as an initiator has been carried out under the inert atmosphere of nitrogen. The system follows ideal kinetics i.e. R-p alpha[BPO](0.5)[BMA](1.0)[Lim](-1.0). The rate of polymerization (Rp) decreases as [limonene] increases, which might be due to penultimate unit effect. The overall energy of activation has been calculated as 34 kJ/mol. The formation of the copolymer is confirmed by the presence of bands at 1727 and 2956 cm(-1) due to ester carbonyl of butyl methacrylate and olefinic C-H stretching of limonene, respectively. Further, the peaks at 3.8-4.2 and 5.0-5.6 delta, were observed in H-1 NMR spectra due to methylene proton adjacent to ester linkage of butyl methacrylate and trisubstituted olefinic protons of limonene, respectively. The value of reactivity ratios r(1)(BMA) = 0.125 and r(2)(Lim.)= 0.026 has been calculated by using Kelen-Tudos method. Alfrey-Price Q-e parameter for limonene has been Calculated as 0.30 and -0.46. The glass transition temperature of the copolyrner is determined as 35 degreesC.