摘要:
The organolanthanide hydrides (Cp'.sub.2 LnH).sub.2 (Cp'=.eta..sup.5 -Me.sub.5 C.sub.5 ;Ln=Sm,Lu) rapidly catalyze the copolymerization of methylenecyclopropane and ethylene to cleanly yield high molecular weight polyolefins of microstructure {[CH.sub.2 CH.sub.2 ].sub.x [CH.sub.2 CH.sub.2 C(CH.sub.2)].sub.y }n via sequential olefin insertion and ring-opening/.beta.-alkyl shift processes. Homopolymerization of methylenecyclopropane likewise cleanly yields polymers of the structure [CH.sub.2 CH.sub.2 C(CH.sub.2)].sub.n.
摘要翻译:有机镧系元素氢化物(Cp'2LnH)2(Cp'= eta 5-Me5C5; Ln = Sm,Lu)快速催化亚甲基环丙烷和乙烯的共聚,以清洁地得到高分子量微观结构的聚烯烃{[CH 2 CH 2] x [CH2CH2C )] y} n经由顺序的烯烃插入和开环/β-烷基转移过程。 亚甲基环丙烷的均聚同样干净地得到结构[CH2CH2C(CH2)] n的聚合物。