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由双环戊二烯基钛取代环丁烷化合物经与甲醇反应得到的Cp2TiR(OMe)作为主催化剂,在烷基铝存在下催化乙烯与丙烯共聚合,研究了助催化剂种类、铝钛比和单体比对催化活性的影响.结果表明,含氯的烷基铝能有效促使主催化剂呈现活性.根据共聚物组成与单体组成的关系测得两种单体的竞聚率为rE=53,rP=003,rErP=016,表明该体系为无规共聚合.用13CNMR测定共聚物的序列结构分布,结果表明丙烯链节大部分是孤立存在的,被乙烯链节或链段所分隔.
CpdTiR (OMe) obtained from the reaction of dicyclopentadienyltitanium-substituted cyclobutane with methanol was used as the main catalyst to catalyze the copolymerization of ethylene with propylene in the presence of aluminum alkyl. Effect of body ratio on catalytic activity. The results show that the chlorine-containing aluminum alkyl can effectively promote the activity of the main catalyst. According to the relationship between the copolymer composition and the monomer composition, the reactivity ratio of the two monomers was rE = 53, rP = 003, rErP = 016, indicating that the system was random copolymerization. The 13CNMR was used to determine the sequence structure of the copolymer. The results showed that most of the propylene segments existed in isolation and were separated by ethylene segments or segments.