Organolanthanide-catalyzed synthesis of phosphine-terminated polyethylenes

Amber M. Kawaoka, Tobin J Marks

Research output: Contribution to journalArticle

62 Citations (Scopus)

Abstract

Organolanthanide-mediated hydrophosphination and ethylene polymerization are coupled in a catalytic cycle to produce diphenylphosphine-terminated polyethylenes. The resulting polymers were characterized by 1H, 13C, and 31P NMR, GPC, and DSC and compared spectroscopically to the model compound, 1-eicosyldiphenylphosphine oxide. High activities (107 g polymer/(mol Ln·atm ethylene·h)) and narrow polydispersities were observed in the polymerization/chain transfer process. Polyethylene molecular weights were found to be inversely proportional to diphenylphosphine concentration, supporting a chain transfer mechanism. The present discovery represents the first case in which an electron-rich phosphine functions efficiently as a chain transfer agent in a single-site fn/d0-mediated olefin polymerization process.

Original languageEnglish
Pages (from-to)12764-12765
Number of pages2
JournalJournal of the American Chemical Society
Volume126
Issue number40
Publication statusPublished - Oct 13 2004

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phosphine
Polyethylenes
Polymerization
Polymers
Polydispersity
Alkenes
Polyethylene
Oxides
Olefins
Ethylene
Molecular Weight
Molecular weight
Nuclear magnetic resonance
Electrons

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Organolanthanide-catalyzed synthesis of phosphine-terminated polyethylenes. / Kawaoka, Amber M.; Marks, Tobin J.

In: Journal of the American Chemical Society, Vol. 126, No. 40, 13.10.2004, p. 12764-12765.

Research output: Contribution to journalArticle

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