Block copolymers of β-pinene with styrene (St) and p-methylstyrene (pMeSt) were prepared by sequential living cationic polymerization initiated with HCl-adducts of styrene(a) and 2-chloroethyl vinyl ether(b) respectively
in the presence of TiCl4/Ti(OiPr)4(at 3:1 mole ratio) and nBu4NCl in CH2Cl2 at -40℃.β-pinene macromonomer with methacryloxy group at the α-end was also synthesized by the living cationic polymerization of β-pinene initiated with HCl adducts of vinyl ether (c
CH3CH- (OCH2CH2X)Cl
X=methacrylate).The macromonomer was copolymerized with methyl methacrylate(MMA) in the presence of AIBN in toluene at 60℃ to give graft eopolymers carrying poly(β-pinene)as graft chain.