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
< Reduce
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 2 LCPO : Biopolymers & Bio-sourced Polymers
Language
en
Article de revue
This item was published in
Polymer Chemistry. 2012, vol. 3, n° 3, p. 658-6678
Royal Society of Chemistry - RSC
English Abstract
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 ...Read more >
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.Read less <
English Keywords
SINGLE-SITE CATALYSTS
ETHYLENE POLYMERIZATION
ALKYLALUMINUM COCATALYST
ZIRCONOCENE CATALYSTS
ALPHA-OLEFINS
Origin
Hal imported