Syndiospezifische polymerisation von propylen: 2- und 2,7-substituierte metallocenkomplex des typs (C13H8−nRnCR′2C5H4)MCl2 (n = 1,2; R alkoxy, alkyl, aryl, hal; R′ Me, Ph; M Zr, Hf)
摘要:
Seventeen new catalyst. precursors for the syndiospecific polymerization of propylene are presented. The new metallocene complexes are substituted in the positions 2 and 7 of the fluorenlidene fragment by MeO-, halogen-, alkyl- and aryl groups. The focus is directed on effective new synthetic routes to substituted fluorenes and the preparation of Be catalyst precursors. In addition first polymerization results are reported.
NOVEL TRANSITION METAL COMPOUND, TRANSITION METAL CATALYST
COMPOSITION CONTAINING THE SAME, AND METHOD FOR PRODUCING
COPOLYMER OF ETHYLENE AND a-OLEFIN USING THE SAME
申请人:Hanwha TotalEnergies Petrochemical Co., Ltd.
公开号:US20240010665A1
公开(公告)日:2024-01-11
The present disclosure relates to a novel transition metal compound, a transition metal catalyst composition having high catalytic activity for producing a copolymer of ethylene and α-olefin containing the same, a method for producing a copolymer of ethylene and α-olefin using the same, and a copolymer of ethylene and α-olefin produced using the same.
Syndiospezifische polymerisation von propylen: 2- und 2,7-substituierte metallocenkomplex des typs (C13H8−nRnCR′2C5H4)MCl2 (n = 1,2; R alkoxy, alkyl, aryl, hal; R′ Me, Ph; M Zr, Hf)
作者:Helmut G. Alt、Roland Zenk
DOI:10.1016/0022-328x(95)06045-x
日期:1996.9
Seventeen new catalyst. precursors for the syndiospecific polymerization of propylene are presented. The new metallocene complexes are substituted in the positions 2 and 7 of the fluorenlidene fragment by MeO-, halogen-, alkyl- and aryl groups. The focus is directed on effective new synthetic routes to substituted fluorenes and the preparation of Be catalyst precursors. In addition first polymerization results are reported.
Ca‐Mediated Styrene Polymerization: Tacticity Control by Ligand Design
作者:Dirk F.‐J. Piesik、Karin Häbe、Sjoerd Harder
DOI:10.1002/ejic.200700802
日期:2007.12
for inversion at the chiral benzylic carbon atom [18.7(2)–19.2(2) kcal/mol]. Complex 4 does not initiate styrenepolymerization, which underscores the importance of a free coordination site at calcium. Complexes 5–9 initiate styrenepolymerization, and the syndiotacticity of the obtained polymers increases with the bulkiness of the substituents on the fluorenyl ligands. Syndiotacticities up to r = 95 %