INFLUENCE OF LIGANDS AND COCATALYST ON THE ACTIVITY IN ETHYLENE POLYMERIZATION OF SOLUBLE TITANIUM COMPLEXES

被引：15

作者：

CONTI, G

ARRIBAS, G

ALTOMARE, A

CIARDELLI, F

机构：

[1] UNIV PISA,DEPT CHEM & IND CHEM,VIA RISORGIMENTA 35,I-56126 PISA,ITALY

[2] CENT UNIV VENEZUELA,FAC CIENCIAS,ESCUELA QUIM,CARACAS,VENEZUELA

来源：

JOURNAL OF MOLECULAR CATALYSIS | 1994年 / 89卷 / 1-2期

关键词：

TITANIUM; ETHYLENE; POLYMERIZATION; ALUMINUM; TRIALKYL; METHYLALUMOXANE;

D O I：

10.1016/0304-5102(93)E0290-W

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：

Known and new titanium complexes bearing alkoxy, phenoxy, carboxylate and cyclopentadienyl ligands in addition to chlorine have been tested towards ethylene polymerization after activation with aluminum alkyls (AlR3) or methylalumoxane (MAO). In the absence of cyclopentadienyl ligands the optimal productivity obtained is very similar either with AlR3 or MAO, but higher MAO/Ti than AlR3/Ti ratios are necessary. In the case of complexes with the Cp ligand much better productivity can be obtained with high MAO ratios thus confirming that under these conditions a different activation mechanism is operative.

引用

页码：41 / 50

页数：10

共 19 条

[1]

AGAGI K, 1990, POLYM COMMUN, V31, P411

[2] REACTION MODEL FOR ZIEGLER-NATTA POLYMERIZATION PROCESSES [J].