A stereoselective olefin polymerization catalyst contains a complex represented by Formula (1):
wherein n is 2 or 3; R
1
and R
2
are independently an optionally substituted alkyl group or a halogen atom; L is a ligand represented by CH
2
R
3
, a halogen atom, OR
4
, or NR
5
R
6
; R
3
is a hydrogen atom, an aromatic group, or a trialkylsilyl group; R
4
is a lower alkyl group having 1 to 6 carbon atoms; and R
5
and R
6
are independently a hydrogen atom or a lower alkyl group having 1 to 6 carbon atoms. A method for manufacturing stereoselective polyolefin, includes polymerizing an olefin in the presence of the catalyst. The present invention provides a catalyst which enables highly isoselective polymerization generating a polymer having significantly high molecular weight and also can prepare stereoselective polyolefin with a narrow dispersity (Mw/Mn) or with a sharp molecular weight distribution, and provides a method for manufacturing stereoselective polyolefin with the catalyst.
一种立体选择性烯烃聚合催化剂包含由式(1)表示的复合物:
其中n为2或3;R1和R2分别为可选择取代的烷基或卤素原子;L为CH2R3表示的
配体、卤素原子、OR4或NR5R6;R3为氢原子、芳香族基团或三烷基
硅基团;R4为具有1至6个碳原子的低烷基基团;R5和R6分别为氢原子或具有1至6个碳原子的低烷基基团。一种制备立体选择性聚烯烃的方法包括在催化剂存在下聚合烯烃。本发明提供了一种催化剂,可以实现高度立体选择性的聚合,生成具有显著高分子量的聚合物,并且可以制备具有窄分子量分布(Mw/Mn)或尖锐分子量分布的立体选择性聚烯烃,并提供了一种使用该催化剂制备立体选择性聚烯烃的方法。