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Living carbocationic polymerization

IX. Three-arm star telechelic polyisobutylenes by C6H3(C(CH3)2OCH3)3/BCl3 complexes

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Summary

Three-arm star telechelic liquid polyisobutylenes PIB carrying exactly three -CH2C(CH3)2Cl end groups have been synthesized by living carbocationic polymerization using C6H3(C(CH3)2OCH3)3/BCl3 complexes in CH3Cl and CH2Cl2 diluents in the 0° to −30°C range. The living nature of the polymerizations was demonstrated by linear Mn versus WPIB (g PIB) formed plots starting at the origin and horizontal N (moles of PIB) versus WPIB plots. Initiating efficiency (Ieff) was close to ∼100% and Mn was determined by the [monomer]/[initiator] ratio. Polymerizations guenched by methanol yield tert.-chlorine end groups which have been quantitatively converted to isopropylidene (-CH2C(CH3)=CH2) termini.

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Author notes

  1. Biao Wang

    Present address: Scientific Research Institute of Petroleum Exploration and Development, Beijing, People's Republic of China

Authors and Affiliations

  1. Institute of Polymer Science, University of Akron, 44325, Akron, OH, USA

    Munmaya K. Mishra, Biao Wang & Joseph P. Kennedy

Authors
  1. Munmaya K. Mishra
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  2. Biao Wang
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  3. Joseph P. Kennedy
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Mishra, M.K., Wang, B. & Kennedy, J.P. Living carbocationic polymerization. Polymer Bulletin 17, 307–314 (1987). https://doi.org/10.1007/BF00955713

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  • DOI: https://doi.org/10.1007/BF00955713

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