Preparation of MgCl2-supported Ziegler-Natta catalyst systems with new electron donors

被引：23
作者：
Marques, Maria de Fatima V. [1 ]
Cardoso, Renata da Silva [1 ]
da Silva, Micheli Galvao [1 ]
机构：
[1] Univ Fed Rio de Janeiro, Inst Macromol Prof Eloisa Mano, BR-21941590 Rio De Janeiro, Brazil
来源：
APPLIED CATALYSIS A-GENERAL | 2010年 / 374卷 / 1-2期
关键词：
Ziegler catalysts; Electron donors; Polypropylene; Isotacticity; PROPYLENE POLYMERIZATION; ACTIVE-SITES; MOLECULAR-WEIGHT; POLYPROPYLENE; MODEL; KINETICS; FRACTIONATION; TEMPERATURE; TACTICITY; HYDROGEN;
D O I：
10.1016/j.apcata.2009.11.027
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In the present work, the effect of new internal and external electron donors for Ziegler-Natta systems of the type MgCl2/Dl/TiCl4/DE/AlR3 Was compared with the conventional use of n-butyl phthalate and dimethoxy-diphenylsilane as electron donors. Catalyst systems employing various internal and external donors were evaluated in propylene polymerization. The polymers were characterized by infrared absorption spectroscopy, differential scanning calorimetry, and heptane extraction. The prepared catalysts with the new internal donors produced polypropylene with isotactic index up to 98% under the polymerization conditions employed. (c) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：65 / 70
页数：6
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