Several nickel a-diimine compounds of the general formula (ArN=C(R)-C(R)= NAr)NiX2 (Ar = 2,6-alkyl substituted Ph, R = H or CH3, X = Br or CH3) were tested in ethylene polymerization after activation with different co-catalysts, such as methylaluminoxane, AI(C2H5)zCl or other aluminium alkyls, and ionizing reagents like B(C&)3, [CPh3][B(C6F5)4] or HBF,. The performances of the different catalytic systems were compared with reference to polymer productivity and structure. The degree of branching of the obtained polyethylenes was shown to depend not only on the ligand environment at the Ni centre but also on the type of co-catalyst

Polymerization of ethylene with nickel α-diimine catalysts

PAPPALARDO D;
1997-01-01

Abstract

Several nickel a-diimine compounds of the general formula (ArN=C(R)-C(R)= NAr)NiX2 (Ar = 2,6-alkyl substituted Ph, R = H or CH3, X = Br or CH3) were tested in ethylene polymerization after activation with different co-catalysts, such as methylaluminoxane, AI(C2H5)zCl or other aluminium alkyls, and ionizing reagents like B(C&)3, [CPh3][B(C6F5)4] or HBF,. The performances of the different catalytic systems were compared with reference to polymer productivity and structure. The degree of branching of the obtained polyethylenes was shown to depend not only on the ligand environment at the Ni centre but also on the type of co-catalyst
File in questo prodotto:
File Dimensione Formato  
Pappalardo_et_al-1997-Macromolecular_Rapid_Communications.pdf

non disponibili

Licenza: Non specificato
Dimensione 306.64 kB
Formato Adobe PDF
306.64 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.12070/5685
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 70
  • ???jsp.display-item.citation.isi??? 68
social impact