BOUILHAC, Cécile; CLOUTET, Eric; TATON, Daniel; DEFFIEUX, Alain; BORSALI, Redouane; CRAMAIL, Henri

doi:10.1002/pola.23142

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BOUILHAC, Cécile
Laboratoire de Chimie des Polymères Organiques [LCPO]

CLOUTET, Eric

Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 4 LCPO : Polymer Materials for Electronic, Energy, Information and Communication Technologies

TATON, Daniel

Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 1 LCPO : Polymerization Catalyses & Engineering

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Journal of Polymer Science Part A: Polymer Chemistry. 2009, vol. 47, n° 1, p. 197-209

Wiley

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New micelle-like organic supports for single site catalysts based on the self-assembly of polystyrene-b-poly(4-vinylbenzoic acid) block copolymers have been designed. These block copolymers were synthesized by sequential atom transfer radical polymerization (ATRP) of styrene and methyl 4-vinylbenzoate, followed by hydrolysis. As evidenced by dynamic light scattering, self-assembly in toluene that is a selective solvent of polystyrene, induced the formation of micelle-like nanoparticles composed of a poly(4-vinylbenzoic acid) core and a polystyrene corona. Further addition of trimethylaluminium (TMA) afforded in situ MAO-like species by diffusion of TMA into the core of the micelles and its subsequent reaction with the benzoic acid groups. Such reactive micelles then served as nanoreactors, MAO-like species being efficient activators of 2,6-bis[1-{(2,6-diisopropylphenyl)imino}ethyl]pyridinyl iron toward ethylene polymerization. These new micelle-like organic supports enabled the production of polyethylene beads with a spherical morphology and a high bulk density through homogeneous-like catalysis.< Réduire

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beads

block copolymer

diblock copolymers

metallocene catalysts

micelles

polyethylene (PE)

post-metallocene

supports

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Block copolymer micelles as nanoreactors for single-site polymerization catalysts

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