Control of morphology in olefin polymerization catalyzed by nickel diimine complexes encapsulated into polybutadiene based support
CRAMAIL, Henri
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 2 LCPO : Biopolymers & Bio-sourced Polymers
< Réduire
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 2 LCPO : Biopolymers & Bio-sourced Polymers
Langue
en
Article de revue
Ce document a été publié dans
Polymer Chemistry. 2012, vol. 3, n° 3, p. 658-6678
Royal Society of Chemistry - RSC
Résumé en anglais
commercially available hydroxyl terminated low molecular cis-1,4-polybutadiene was modified by carboxylic functions and used as an effective support in single-site alpha-olefin polymerization. Dynamic light scattering ...Lire la suite >
commercially available hydroxyl terminated low molecular cis-1,4-polybutadiene was modified by carboxylic functions and used as an effective support in single-site alpha-olefin polymerization. Dynamic light scattering analysis of support solution in heptane confirmed increased ability to self-assembly of modified polybutadienes in the presence of methylaluminoxane cocatalyst (MAO). alpha-Diimine nickel and bis(indenyl) zirconium dichloride catalysts activated by trimethylaluminium or MAO cocatalysts were encapsulated into polymer micellar aggregates and used for ethylene and octadec-1-ene polymerization. Furthermore, the effects of cocatalyst type and concentration on the micelle-formation process, activity and morphology of polyethylene (polyoctadec-1-ene) particles were investigated. In the presence of polybutadiene supports, formation of spherical micrometric PE beads was observed during MAO cocatalyzed ethylene polymerization, whereas the activity of polymerization was not decreased.< Réduire
Mots clés en anglais
SINGLE-SITE CATALYSTS
ETHYLENE POLYMERIZATION
ALKYLALUMINUM COCATALYST
ZIRCONOCENE CATALYSTS
ALPHA-OLEFINS
Origine
Importé de halUnités de recherche