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Beneficial influence of nanocarbon on the aryliminopyridylnickel chloride catalyzed ethylene polymerization

Paper ID Volume ID Publish Year Pages File Format Full-Text
50447 46794 2014 4 PDF Available
Title
Beneficial influence of nanocarbon on the aryliminopyridylnickel chloride catalyzed ethylene polymerization
Abstract

•The influence of nanocarbons on nickel-catalyzed ethylene polymerization is studied.•Task specific ligands and nickel complexes were synthesized.•In all cases, a controlled increase of the polyethylene branching is observed.•Few layer graphene allows increase of the catalytic activity and molecular weight.

A series of 1-aryliminoethylpyridine ligands (L1―L3) was synthesized by condensation of 2-acetylpyridine with 1-aminonaphthalene, 2-aminoanthracene or 1-aminopyrene, respectively. Reaction with nickel dichloride afforded the corresponding nickel (II) chloride complexes (Ni1–Ni3). All compounds were fully characterized and the molecular structures of Ni1 and Ni3 are reported. Upon activation with methylaluminoxane (MAO), all nickel complexes exhibit high activities for ethylene polymerization, producing waxes of low molecular weight and narrow polydispersity. The presence of multi-walled carbon nanotubes (MWCNTs) or few layer graphene (FLG) in the catalytic medium can lead to an increase of productivity associated to a modification of the polymer structure.

Keywords
Branching polyethylene; Carbon nanotubes; Ethylene polymerization; Graphene; 2-Iminopyridylnickel complex
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 43, 5 January 2014, Pages 227–230
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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