β-蒎烯嵌段、接枝共聚物的合成

SYNTHESIS OF BLOCK AND GRAFT COPOLYMERS OF β-PINENE

分别使用苯乙烯 HCl加成物 (a)和 2 氯乙基乙烯基醚 HCl加成物 (b)作为引发剂 ,TiCl4 Ti(OiPr) 4(3∶1mol mol)为活化剂 ,在nBu4NCl存在下 ,- 40℃、CH2 Cl2 中 ,通过顺序活性阳离子聚合 ,合成了 β 蒎烯与苯乙烯、对甲基苯乙烯的嵌段共聚物 .又用带丙烯酰氧功能基的引发剂c [CH3CH (OCH2 CH2 X )Cl,X =OCOC(CH3)CH2 ]引发 β 蒎烯活性阳离子聚合 ,合成了 β 蒎烯大分子单体 .该大分子单体在AIBN引发下与甲基丙烯酸甲酯进行自由基共聚 ,获得主链为聚甲基丙烯酸甲酯、侧链为聚 β

Block copolymers of β pinene with styrene(St) and p \|methylstyrene( p MeSt) 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 TiCl\-4/Ti(O i Pr)\-4(at 3∶1 mole ratio) and n Bu\-4NCl in CH 2Cl 2 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,CH\-3CH\+-(OCH\-2CH\-2X)Cl,X=methacrylate).The macromonomer was copolymerized with methyl methacrylate(MMA) in the presence of AIBN in toluene at 60℃ to give graft copolymers carrying poly( β pinene)as graft chain.