Ethylene/1-olefin copolymerization behaviour of vanadium and titanium complexes bearing salen-type ligand

被引：17

作者：

Bialek, Marzena ^{[1
]}

Czaja, Krystyna ^{[1
]}

Pietruszka, Anna ^{[1
]}

机构：

[1] Opole Univ, Fac Chem, Dept Chem Technol & Polymer Chem, PL-45052 Opole, Poland

来源：

POLYMER BULLETIN | 2013年 / 70卷 / 05期

关键词：

Copolymerization; Polyolefin; Salen-type complex; Catalysts; Support; Copolymer heterogeneity; ETHYLENE POLYMERIZATION; THERMAL FRACTIONATION; ZIEGLER-NATTA; CATALYSTS; HOMOPOLYMERIZATION; ETHYLENE-1-HEXENE; HETEROGENEITY; TETRADENTATE; TRIDENTATE; SSA;

D O I：

10.1007/s00289-012-0903-y

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Ethylene/1-olefin copolymerization using vanadium and titanium complexes bearing tetradentate [O,N,N,O]-type ligand and EtAlCl2 or MAO as a cocatalyst is carried out. In the presence of the vanadium complex activated with EtAlCl2 is observed (a) negative "comonomer effect", (b) high comonomer incorporation and narrow chemical composition distribution (CCD), (c) unexpected copolymer microstructure, and (d) increased molecular weight of copolymers when compared with the homopolymer. In contrast, titanium catalyst gives copolymers with lower 1-olefin content and broad CCD. Supported complexes show higher activity, lower 1-olefins incorporation and give copolymers with ultra high molecular weights.

引用

页码：1499 / 1517

页数：19

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