Ethylene polymerization with silica-supported bis[3,5-dinitro-N-(2,6-di isopropylphenyl) salicylaldiminatel]nickel (II)/methylaluminoxane catalysts

被引：9

作者：

Carlini, C ^{[1
]}

Ceccarini, A ^{[1
]}

Fernandes, EG ^{[1
]}

Galletti, AMR ^{[1
]}

Sbrana, G ^{[1
]}

机构：

[1] Univ Pisa, Dipartimento Chim & Chim Ind, I-56126 Pisa, Italy

来源：

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY | 2005年 / 43卷 / 09期

关键词：

addition polymerization; bis[3,5-dinitro-N-(2,6-diisopropylphenyl)salicylaldiminatelnickel(II); methylaluminoxane; organometallic catalysts; polyethylene (PE); silica-supported catalysts; Ziegler-Natta polymerization;

D O I：

10.1002/pola.20727

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 immobilization of alkenyl-functionalized bis(imino)pyridyliron(II) complexes on an SiMe2H-modified silica via hydrolization was performed. MAO-treated silica catalysts (200mg) were reacted with 10 mL of aqueous nitric acid in an ultrasonic bath for 25 minutes, and this solution was separated from silica and after centrifugation and diluted to 100 mL. It was found that these heterogenized catalysts showed improved activities at higher temperature. It was also found that the molecular weights of polymers obtained with heterogenized systems were much higher than those achieved with the corresponding homogeneous catalysts.

引用

页码：1978 / 1984

页数：7

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