Copolymerization of ethylene with 1-hexene promoted by novel multi-chelated non-metallocene complexes with imine bridged imidazole ligand
作者:Lifu Ma、Hongli Wang、Jianjun Yi、Qigu Huang、Kejing Gao、Wantai Yang
DOI:10.1002/pola.23800
日期:2010.1.15
A series of novel bridged multi‐chelated non‐metallocene catalysts is synthesized by the treatment of N,N‐imidazole, N,N‐dimethylimidazole, and N,N‐benzimidazole with n‐BuLi, 2,6‐dimethylaniline, and MCl4 (M = Ti, Zr) in THF. These catalysts are used for copolymerization of ethylene with 1‐hexene after activated by methylaluminoxane (MAO). The effects of polymerization temperature, Al/M molar ratio
一系列新颖的桥连多螯合非茂金属催化剂是由处理的合成N,N-咪唑,N,N- -dimethylimidazole,和N,N-苯并咪唑与Ñ正丁基锂,2,6-二甲基苯胺,和MCL 4(M = Ti,Zr)在THF中的溶液。这些催化剂被甲基铝氧烷(MAO)活化后,用于乙烯与1-己烯的共聚。详细研究了聚合温度,Al / M摩尔比和单体压力对乙烯共聚行为的影响。这些结果表明,这些催化剂有利于乙烯与1-己烯的共聚,具有高催化活性和高共聚单体掺入率。共聚物的特点是13C NMR,WAXD,GPC和DSC。结果证实,所获得的共聚物具有约33–35的宽分子量分布(MWD)和高达9.2 mol%的1-己烯高掺入量,共聚物的熔融温度取决于共聚物链中1-己烯的掺入量和共聚物链中的1-己烯单元被乙烯单元隔离。乙烯均聚物的MWD范围更广,为42-46。©2009 Wiley Periodicals,Inc. J Polym