Effect of free trimethylaluminum content in methylaluminoxane on performances of bis(salicylaldiminate)nickel(II)-based catalysts for ethylene polymerization

被引：11
|
作者：
Carlini, C [1 ]
De Luise, V [1 ]
Fernandes, EG [1 ]
Martinelli, M [1 ]
Galletti, AMR [1 ]
Sbrana, G [1 ]
机构：
[1] Univ Pisa, Dipartimento Chim & Chim Ind, I-56126 Pisa, Italy
来源：
MACROMOLECULAR RAPID COMMUNICATIONS | 2005年 / 26卷 / 10期
关键词：
bis[3,5-dinitro-N-(2,6-iisopropylphenyl) salicylaidiminate]nickel(II); 2,6-di-tert-butylphenol; methylaluminoxane; organometallic catalysts; polyethylene (PE); trimethylaluminum;
D O I：
10.1002/marc.200500005
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The performances of ethylene polymerization catalysts based on III and commercial methylaluminoxane were investigated by reducing the content of free trimethylaluminum in methylaluminoxane by its reaction with 2,6-di-tert-butylphenol. This allowed optimization of the formulation of the catalyst, affording a high-molecular-weight linear polyethylene (PE) with a productivity [(1900 kg of PE/(mol of Ni x h)], ten-fold higher than that previously achieved for the same system adopting commercial methylaluminoxane not pre-treated with the above phenol derivative.
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页码：808 / 812
页数：5
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