Concepedia

Aqueous Suspension Polymerization of Isobutene Initiated by 1,2-C<sub>6</sub>F<sub>4</sub>[B(C<sub>6</sub>F<sub>5</sub>)<sub>2</sub>]<sub>2</sub>

Stewart P. Lewis, Lee D. Henderson, Brett D. Chandler, Masood Parvez, Warren E. Piers, Scott Collins

Journal of the American Chemical Society · 2004 · 83 citations · 13 references

DOI

Concepts

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.

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