Binuclear and Hexanuclear Ti(IV) Complexes Supported by [OOOO]4–-type Ligand for Preparing Disentangled UHMWPE

Binuclear and hexanuclear titanium complexes stabilized by tetradentate [OOOO] 4– -type ligand were active in ethylene polymerization in the presence of Et 2 AlCl/Bu 2 Mg binary co-catalyst, giving high molecular weight polyethylene. The binuclear complex showed significantly higher catalytic activi...

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Bibliographic Details
Published in:Chinese journal of polymer science 2019, Vol.37 (5), p.471-477
Main Authors: Tuskaev, Vladislav A., Gagieva, Svetlana Ch, Kurmaev, Dmitry A., Vasil’ev, Viktor G., Kolosov, Nikolay A., Zubkevich, Sergey V., Mikhaylik, Elena S., Golubev, Evgenii K., Nikiforova, Galina G., Zhizhko, Pavel A., Serenko, Olga A., Bulychev, Boris M.
Format: Article
Language:English
Subjects:
Catalysis
Catalytic activity
Chain entanglement
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Condensed Matter Physics
Deformation
Industrial Chemistry/Chemical Engineering
Ligands
Molecular chains
Molecular weight
Polyethylene
Polymer Sciences
Thermal stability
Titanium
Ultra high molecular weight polyethylene
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Summary:Binuclear and hexanuclear titanium complexes stabilized by tetradentate [OOOO] 4– -type ligand were active in ethylene polymerization in the presence of Et 2 AlCl/Bu 2 Mg binary co-catalyst, giving high molecular weight polyethylene. The binuclear complex showed significantly higher catalytic activity and thermal stability in comparison to mononuclear analogue. Ultra high molecular weight polyethylene (UHMWPE) samples were processed by a solid-state uniaxial deformation into high-strength (up to 2.5 GPa) and highmodulus (over 100 GPa) oriented film tapes, which indirectly indicates a low degree of entanglements between the macromolecular chains.
ISSN:0256-7679
1439-6203
DOI:10.1007/s10118-019-2197-0