Living copolymerization of ethylene with styrene catalyzed by (cyclopentadienyl)(ketimide)titanium(IV) complex - MAO catalyst system

Journal of the American Chemical Society

Volumn 127, Issue 26, 2005, Pages 9364-9365

  Zhang, Hao ^a   Nomura, Kotohiro ^a  

^a NARA INSTITUTE OF SCIENCE AND TECHNOLOGY   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

(CYCLOPENTADIENYL)(KETIMIDE)TITANIUM COMPLEX; ALUMINUM DERIVATIVE; COPOLYMER; CYCLOPENTADIENE DERIVATIVE; ETHYLENE; LIGAND; METAL COMPLEX; METHYLALUMINOXANE; STYRENE; TITANIUM DERIVATIVE; UNCLASSIFIED DRUG;

ARTICLE; CARBON NUCLEAR MAGNETIC RESONANCE; CATALYSIS; CATALYST; CHEMICAL REACTION; GEL PERMEATION CHROMATOGRAPHY; INFRARED SPECTROSCOPY; POLYMERIZATION;

EID: 21644460706     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja052198z     Document Type: Article

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40. Detailed results are shown in the Supporting Information.
41. 3 from the commercially available MAO (PMAO-S, Tosoh Finechem. Co.), and a certain excess amount of MAO was required for exhibiting high catalytic activity (results are shown in the Supporting Information).
42. 14 and amounts of THF insoluble fraction (polyethylene, syndiotactic polystyrene) were negligible.
43. 1H NMR spectra due to the standard samples in the calibration curve for the analysis.
44. 4), the styrene content = 8.4 mol % (obtained 8.1 mol %).
45. 2)-MAO catalyst were attempted under the same conditions as run 8 (6 atm of ethylene, 10 mL of styrene). However, negligible amount of polymers were collected as the acetone insoluble fractions even if the reactions were performed with higher catalyst concentration for 30 min (<5 mg, 2.0 or 10.0 μmol of 3).