Ethylene polymerization in supercritical carbon dioxide with binuclear nickel(ii) catalysts | Zendy

Damien Guironnet | Zendy; Tobias Friedberger | Zendy; Stefan Mecking | Zendy

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Ethylene polymerization in supercritical carbon dioxide with binuclear nickel(ii) catalysts

Author(s) -

Damien Guironnet,

Tobias Friedberger,

Stefan Mecking

Publication year - 2009

Publication title -

dalton transactions

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.98

H-Index - 184

eISSN - 1477-9234

pISSN - 1477-9226

DOI - 10.1039/b912883b

Subject(s) - ethylene , supercritical carbon dioxide , catalysis , supercritical fluid , polymerization , chemistry , branching (polymer chemistry) , polyethylene , polymer chemistry , moiety , polymer , nickel , aryl , solubility , crystallinity , organic chemistry , alkyl , crystallography

A series of new, highly fluorinated neutral (kappa(2)-N,O) chelated Ni(II) binuclear complexes based on salicylaldimines bridged in p-position of the N-aryl group were prepared. The complexes are single-component catalyst precursors for ethylene polymerization in supercritical carbon dioxide and toluene. Solubility of the catalyst precursors in supercritical carbon dioxide is effected by a large number of up to 18 trifluoromethyl groups per molecule. Semicrystalline polyethylene with a low degree of branching is formed (ca. 10 branches/1000 carbon atoms). Polymer microstructures are independent of the nature of the bridging moiety, while stability of the catalysts appears to differ.

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