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

作　　者：Vladislav A.Tuskaev Svetlana Ch.Gagieva Dmitry A.Kurmaev Viktor G.Vasil'ev Nikolay A.Kolosov Sergey V.Zubkevich Elena S.Mikhaylik Evgenii K.Golubev Galina G.Nikiforova Pavel A.Zhizhko Olga A.Serenko Boris M.Bulychev 

机构地区：[1]Department of Chemistry,M.V.Lomonosov Moscow State University [2]A.N.Nesmeyanov Institute of Organoelement Compounds,Russian Academy of Sciences [3]Enikolopov Institute of Synthetic Polymer Materials,Russian Academy of Sciences

出　　处：《Chinese Journal of Polymer Science》2019年第5期471-477,共7页高分子科学（英文版）

基　　金：financially supported by the Russian Science Foundation(No.16-13-10502)

摘　　要：Binuclear and hexanuclear titanium complexes stabilized by tetradentate [OOOO]^(4–)-type ligand were active in ethylene polymerization in the presence of Et2 AlCl/Bu2 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.Binuclear and hexanuclear titanium complexes stabilized by tetradentate [OOOO]^(4–)-type ligand were active in ethylene polymerization in the presence of Et2 AlCl/Bu2 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.

关 键 词：BINUCLEAR catalysts Titanium Ethylene ZIEGLER-NATTA polymerization UHMWPE 

分 类 号：O632.12[理学—高分子化学]