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Novel tandem catalytic system of β-diketonate zirconium/two different cocatalysts for preparing branched polyethylene

Paper ID Volume ID Publish Year Pages File Format Full-Text
51497 46844 2009 5 PDF Available
Title
Novel tandem catalytic system of β-diketonate zirconium/two different cocatalysts for preparing branched polyethylene
Abstract

Tandem catalytic systems, consisting of one catalyst with two different activators, were successfully employed in preparing branched polyethylene from ethylene as sole monomer. The catalyst precursor (β-diketonate zirconium) was used in combination with diethylaluminium chloride (AlEt2Cl) and methylaluminoxane (MAO) (or trialkylaluminum AlR3) as cocatalysts to form the oligomerization active species and copolymerization active species, respectively. The 13C NMR spectrum revealed that the resultant polymer was branched polyethylene. The molar ratio between the two cocatalysts had a remarkable effect on the catalytic activity and the properties of copolymer, such as melting temperature, crystallinity, molecular weight and molecular weight distribution.

Keywords
Tandem catalysis; Branched polyethylene; β-Diketonate zirconium complex; Alkylaluminum; Methylaluminoxane
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Novel tandem catalytic system of β-diketonate zirconium/two different cocatalysts for preparing branched polyethylene
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 10, Issue 10, 20 May 2009, Pages 1427–1431
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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