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J Am Chem Soc. 2005 Jan 12;127(1):46-7.

Aqueous suspension polymerization of isobutene initiated by 1,2-C6F4[B(C6F5)2]2.

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1
Department of Polymer Science, University of Akron, Akron, Ohio 44325-3909, USA.

Abstract

Lewis acidic, chelating diborane 1 forms stable oxonium acids 2 in the presence of excess MeOH or water. Diborane 1 is shown to be an effective co-initiator for the suspension polymerization of isobutene in aqueous media at sufficiently low temperatures. Poly(isobutene) or butyl rubber is obtained at moderate to high conversion and with Mw < 200 K and PDI approximately 2 under these conditions.

PMID:
15631441
DOI:
10.1021/ja0445387
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