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- Title
Synthesis of Novel Bis(β-enaminoketonato)titanium Catalyst with High Activity and Excellent Ability to Copolymerize Olefins.
- Authors
Yang, Guofan; Hong, Miao; Li, Yuesheng; Yu, Shijun
- Abstract
A new titanium complex [PhN=C(Ph)CHC(CF3)O]2TiCl2 (2a), with an asymmetric β-enaminoketonato [N,O] ligand, has been synthesized and fully characterized. With modified methylaluminoxane as a cocatalyst, the behaviors of ethylene polymerization, and ethylene/α-olefin and ethylene/norbornene copolymerization have been explored in detail. Relative to its regioisomer 2b ([PhN=C(CF3)CHC(Ph)O]2TiCl2), the present catalyst exhibits significant predominance. The catalytic activity in 2a-catalyzed homo- and copolymerization are much higher than those in 2b-catalyzed (co)polymerization. Furthermore, compared with 2b, catalyst 2a possesses an obviously stronger ability towards copolymerization, due to a wide coordination space caused by exchanging the position of the phenyl group and trifluoromethyl group on the framework.
- Publication
Macromolecular Chemistry & Physics, 2012, Vol 213, Issue 21, p2311
- ISSN
1022-1352
- Publication type
Article
- DOI
10.1002/macp.201200350