The living cationic polymerization of β-pinene was carried out with α-chloroethylbenzene／Ti(OiPr)4／TiCl4(Ti(OiPr)4/TiCl4 mole ratio：1／3) initiating system in CH2C12 at -40℃．After 25 min of reaction(β pineneconversion～100％)

the resulted living poly(β-pinene) was capped with a few units of styrene and then the polymerization Was quenched to giveβ-pinene macroinitiator with banzyl chloride chain end (P(β-p)-St-Cl)．1H-NMR analysis of the obtained polymer showed that each macroinitiator molecule possessed almost one banzyl chloride end group．The macroinitiator in conjunction with Ti(OiPr)4／TiCl4(Ti(OiPr)4/TiCl4 mole ratio：1/3) could readily initiate the cationic polymerization of styrene to give β-pinene／styren block copolymers．The macroinitiator was also used to initiate the atom transfer radical polymerization of methyl methacrylate (MMA) in the presence of CuCl/2

2'-bipyridine．The product was a mixture ofβ-pinene／MMA block copolymer and unreacted macroinitiator

indicating that the initiating efficiency was below 100％．