Investigation of the reaction between benzophenone and trimethylaluminium: A source of novel aluminic activator for single-site olefin polymerization catalysts

Thomas Dalet (1) , Henri Cramail (1, 2) , Alain Deffieux (1)

1 LCPO - Laboratoire de Chimie des polymères organiques
2 Team 2 LCPO : Biopolymers & Bio-sourced Polymers

The reaction between benzophenone and TMA was investigated in details at 20 degrees C for different TMA/benzophenone (r) ratios. For r = 2, a heterodimer mu-(1,1-diphenylethoxy)-mu-methyl-tetramethyldialuminium (B) is only formed. The latter was found able to activate MeDIP(2,6-iPrPh)(2)FeCl2 catalyst towards ethylene polymerization. Such catalytic system leads to the formation of high molar mass polyethylene with a broad molar mass distribution, without the presence of oligomers, that is attributed to a strong reduction of the transfer reaction to TMA

Mots clés: benzophenone; catalysts; iron catalyst; MAO; polyethylene (PE)

Domaines: Polymères

Thomas Dalet, Henri Cramail, Alain Deffieux. Investigation of the reaction between benzophenone and trimethylaluminium: A source of novel aluminic activator for single-site olefin polymerization catalysts. Macromolecular Symposia, 2006, 231, pp.110-115. ⟨10.1002/masy.200551312⟩. ⟨hal-00395729⟩