Journal
ORGANOMETALLICS
Volume 29, Issue 22, Pages 6111-6116Publisher
AMER CHEMICAL SOC
DOI: 10.1021/om100883n
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Funding
- Australia Research Council [DP0665058]
- Australian Research Council [DP0665058] Funding Source: Australian Research Council
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The mechanism of polymer chain growth at the Phillips catalyst has been studied, with the three prevailing mechanistic proposals, the Cosee-Arlman, Green-Rooney, and metallacycle mechanisms, considered. Through analysis of low molecular weight oligomers/polymers formed during ethylene/alpha-olefin copolymerization with labeled monomers, it is shown that the isotopomer distribution is inconsistent with a metallacycle mechanism. Further analysis of polymer formed by copolymerization of labeled ethylene was used to rule out a Green-Rooney mechanism. The results support the notion of chain growth via a Cossee-Arlman process.
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