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Homo-, co- and terpolymerization of 1,5-hexadiene using a methylalumoxane activated mono-Cp-amido-complex

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Summary

Homo- and copolymerizations of 1,5-hexadiene with ethene and styrene using halfsandwich metallocene catalyst Me2Si(Me4Cp)(N-tert-butyl)TiCl2 / MAO (Cp=cyclopentadienyl, Me=methyl, MAO=methylalumoxane) were investigated. According to 13C-NMR spectroscopic microstructure analysis, cyclopolymerization of 1,5-hexadiene afforded randomly distributed cis- and trans-cyclopentane rings in the homo- and copolymer backbone. 1,5-hexadiene incorporation reached 52 mol-%. The ratio of vinyl side chains to cyclopentane rings was controlled by 1,5-hexadiene concentration, where low 1,5-hexadiene concentration promoted cyclopolymerization. Copolymer glass transition temperatures increased with increasing content of cyclic units in the backbone. Styrene was used successfully as termonomer in ethene/1,5-hexadiene polymerization, resulting in a semicrystalline terpolymer with cyclic and styrenic units in the polymer backbone.

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Authors and Affiliations

  1. Freiburger Materialforschungszentrum und Institut für Makromolekulare Chemie der Albert-Ludwigs-Universität Freiburg, Stefan-Meier-Strasse 21, D-79104, Freiburg, Germany

    F. G. Sernetz & R. Mülhaupt

  2. Department of Chemistry, Stanford University, 94305, Stanford, CA, USA

    R. M. Waymouth

Authors
  1. F. G. Sernetz
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  2. R. Mülhaupt
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  3. R. M. Waymouth
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Sernetz, F.G., Mülhaupt, R. & Waymouth, R.M. Homo-, co- and terpolymerization of 1,5-hexadiene using a methylalumoxane activated mono-Cp-amido-complex. Polymer Bulletin 38, 141–148 (1997). https://doi.org/10.1007/s002890050030

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  • DOI: https://doi.org/10.1007/s002890050030

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