학술논문
TiIV complexes with an OSSO-type diol ligand in the catalysis of olefin polymerization
Document Type
Brief Communication
Author
Source
Russian Chemical Bulletin. 72(4):1093-1098
Subject
Language
English
ISSN
1066-5285
1573-9171
1573-9171
Abstract
The OSSO-type diol ligand and the TiIV dichloride and bis-isopropoxide complexes with this ligand were synthesized. The structure of the latter complex was determined by single-crystal X-ray diffraction analysis. The catalytic activity of the systems based on the complexes (OSSO)TiCl2 and (OSSO)Ti(OPri )2 , which were activated with mixtures of alkylaluminum chlorides (Et2 AlCl, Et3 Al2 Cl3 ) and dibutylmagnesium, was studied in the polymerization of ethylene and its copolymerization with propylene. It was found that the homopolymerization affords ultra-high-molecular-weight polyethylene (UHMWPE) with a molecular weight up to 10.6·106 , and the copolymerization gives copolymers containing up to 43 mol.% propylene units.