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RESEARCH PRODUCT
Ethylene/1-olefin copolymerization behaviour of vanadium and titanium complexes bearing salen-type ligand
Marzena BiałekKrystyna CzajaAnna Pietruszkasubject
Olefin fibersupportEthyleneMaterials scienceChemistry(all)Polymers and PlasticsComonomerVanadiumchemistry.chemical_elementGeneral Chemistrysalen-type complexCondensed Matter Physicscopolymer heterogeneitycatalystsPolyolefinCatalysiscopolymerizationchemistry.chemical_compoundchemistryPolymer chemistryCopolymerMaterials ChemistrypolyolefinTitaniumdescription
Ethylene/1-olefin copolymerization using vanadium and titanium complexes bearing tetradentate [O,N,N,O]-type ligand and EtAlCl2 or MAO as a cocatalyst is carried out. In the presence of the vanadium complex activated with EtAlCl2 is observed (a) negative “comonomer effect”, (b) high comonomer incorporation and narrow chemical composition distribution (CCD), (c) unexpected copolymer microstructure, and (d) increased molecular weight of copolymers when compared with the homopolymer. In contrast, titanium catalyst gives copolymers with lower 1-olefin content and broad CCD. Supported complexes show higher activity, lower 1-olefins incorporation and give copolymers with ultra high molecular weights.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-01-11 | Polymer Bulletin |