Matches in SemOpenAlex for { <https://semopenalex.org/work/W2088159335> ?p ?o ?g. }
- W2088159335 endingPage "2525" @default.
- W2088159335 startingPage "2525" @default.
- W2088159335 abstract "A number of cyclopentadienyltitanium aryloxide complexes, 1-Ar-2,3,4,5-Me(4)-Cp(2,6-(i)Pr(2)C(6)H(3)O)TiCl(2) (Ar = 4-Me(3)SiPhenyl (5), 4-(i)PrPhenyl (6), 4-MePhenyl (7), 3,5-(CF(3))(2)Phenyl (8)) and (1-Ar-2,3,4,5-Me(4)CpTiCl(2))(2)(OAr'O) (Ar' = 4,4'-(3,3',5,5'-(i)Pr(4)C(6)H(2)-C(6)H(2)), Ar = 4-SiMe(3)Phenyl (9), 4-MePhenyl (10)) were synthesized from the reaction of a corresponding cyclopentadienyl titanium trichloride derivative with the lithium salt of a relevant phenol. The molecular structures of complexes 6, 7 and 8 were determined by X-ray crystallography. Upon activation with (i)Bu(3)Al and Ph(3)CB(C(6)F(5))(4), all mononuclear complexes 5-8 exhibit good catalytic activities for propylene polymerization, whereas the binuclear complexes 9 and 10 show lower catalytic activities under the same polymerization conditions. (13)C NMR, DSC and GPC analysis indicates the produced polymers are atactic polypropylene with relatively high molecular weight. It was found that the substituents on both the cyclopentadienyl and aryloxy ligands of these complexes show obvious influence on the molecular weight of the resultant polymers with complex 5 producing the highest molecular weight atactic polypropylene. Complexes 5, 6 and 7 were also tested as catalysts for copolymerization of propylene with 1-hexene and copolymers with 1.2-10.1% comonomer incorporation were obtained in reasonable catalytic activity." @default.
- W2088159335 created "2016-06-24" @default.
- W2088159335 creator A5023185995 @default.
- W2088159335 creator A5025632368 @default.
- W2088159335 creator A5034518450 @default.
- W2088159335 creator A5035297281 @default.
- W2088159335 creator A5049588474 @default.
- W2088159335 date "2010-01-01" @default.
- W2088159335 modified "2023-09-28" @default.
- W2088159335 title "Propylene polymerization to high molecular weight atactic polypropylene and copolymerization with 1-hexene using monocyclopentadienyl titanium catalysts" @default.
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- W2088159335 doi "https://doi.org/10.1039/b921617k" @default.