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Enhanced ethylene polymerization of Ni(II) complexes supported on carbon nanotubes

Paper ID Volume ID Publish Year Pages File Format Full-Text
54674 47020 2014 8 PDF Available
Title
Enhanced ethylene polymerization of Ni(II) complexes supported on carbon nanotubes
Abstract

•Task specific nickel(II) complexes were synthesized.•These complexes were covalently immobilized onto the surface of carbon nanotubes.•The corresponding catalytic systems promoted ethylene polymerization.•Beneficial influence of carbon nanotubes on the catalytic activity was evidenced.•Immobilized systems produced higher molecular weight of the polyethylenes.

A series of nickel complexes Ni1–Ni4 containing N-(5,6,7-trihydroquinolin-8-ylidene)aminoaryl ligands was prepared in good yields. The amino group present allowed covalent anchoring of these complexes through an amido link onto the surface of two kinds of multi-walled carbon nanotubes (MWCNTs). XPS analysis evidenced that the molecular structure of these Ni(II) complexes was maintained after grafting. Activated by MAO, these catalytic systems promoted ethylene polymerization. Our studies evidenced the beneficial influence of the MWCNTs since in most cases, heterogeneized systems are more active than the corresponding unsupported catalysts, producing higher molecular weight polymers in which MWCNTs are homogeneously dispersed.

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Keywords
Carbon nanotubes; Supported catalysis; Ethylene polymerization; Iminopyridylnickel complexes
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Enhanced ethylene polymerization of Ni(II) complexes supported on carbon nanotubes
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 235, 15 October 2014, Pages 33–40
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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