Radical polymerization of limonene (limonene) using benzoyl peroxide (BPO) as an initiator at 85 C 6 1 C under an inert atmosphere of nitrogen in xylene as solvent was carried out. The system follows nonideal kinetics: R p a [I] 0.3 [M] 1.4 , due to both primary radical termination and degradative chain transfer reaction. The activation energy of the polymerization was estimated to be 22.97 kJ mol À1 . 1 H-NMR spectrum of polymer shows the presence of a triplet between 2 and 2.5 d, which reveals that b-carbon of limonene is the active site in the polymerization of limonene. The FTIR spectrum of the polymer shows band at 1645 cm À1 due to gem disubstituted C¼ ¼C stretching vibrations. The glass transition temperature (T g ) of the polylimonene of the polylimonene is 116 C.

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