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Synthesis of Halogen-Free Polyisobutylene by in situ Hydride Transfer to Living Polyisobutylene from Tributylsilane

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Summary

Hydride transfer reaction between living polyisobutylene cation (PIB+) and tributylsilane in hexanes/methyl chloride 60/40 (v/v) solvent mixtures at -80, -70 and -60 °C was studied to synthesize halogen-free polyisobutylene (PIB). The hydride transfer reaction between tributylsilane and living PIB capped with 1,1-ditolylethylene (PIB-DTE+) have also been carried out under similar conditions at -80 °C. The rate of hydride transfer reaction increases with the increase of tributylsilane concentration for the reaction of both PIB+ and PIB-DTE+ with tributylsilane. Gel Permeation Chromatography and NMR Spectroscopy suggested practically complete capping of the polymeric cation and the absence of side reactions.

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Authors and Affiliations

  1. Polymer Science Program, Department of Chemistry, University of Massachusetts Lowell, One University Avenue, Lowell, MA, 01854, USA

    Priyadarsi De & Rudolf Faust

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  1. Priyadarsi De
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  2. Rudolf Faust
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Correspondence to Rudolf Faust.

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De, P., Faust, R. Synthesis of Halogen-Free Polyisobutylene by in situ Hydride Transfer to Living Polyisobutylene from Tributylsilane. Polym. Bull. 56, 27–35 (2006). https://doi.org/10.1007/s00289-005-0465-3

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  • DOI: https://doi.org/10.1007/s00289-005-0465-3

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