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Synthesis of block copolymers with poly(methyl methacrylate): P(B-b-MMA), P(EB-b-MMA), P(S-b-B-b-MMA) and P(S-b-EB-b-MMA)

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Summary

Well-defined diblock copolymers poly(butadiene-b-methyl methacrylate) (=P(B-b-MMA)) and triblock copolymers poly(styrene-b-butadiene-b-methyl methacrylate) (=P(S-b-B-b-MMA)) have been prepared by sequential anionic polymerization in THF. The synthesis of P(B-b-MMA) and P(S-b-B-b-MMA) was most efficient in the presence of lithium alkoxides. By this method side reactions are suppressed and the polymerization can be performed at higher temperatures. The resulting triblock copolymers have narrow molecular weight distribution. The 1,2-PB midblock was quantitatively hydrogenated with tosylhydrazide to enhance thermal stability. Alternatively the hydrogenation can be performed at elevated pressure using hydrogen and Wilkinson-catalyst in butanone. Heterogeneous catalyst systems based on Palladium did not yield quantitative hydrogenation.

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Author notes

  1. Clemens Auschra

    Present address: Röhm GmbH, Darmstadt, Germany

Authors and Affiliations

  1. Institut für Organische Chemie, Johannes Gutenberg-Universität, J.J. Becherweg 18-20, W-6500, Mainz, Germany

    Clemens Auschra & Reimund Stadler

Authors
  1. Clemens Auschra
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  2. Reimund Stadler
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Auschra, C., Stadler, R. Synthesis of block copolymers with poly(methyl methacrylate): P(B-b-MMA), P(EB-b-MMA), P(S-b-B-b-MMA) and P(S-b-EB-b-MMA). Polymer Bulletin 30, 257–264 (1993). https://doi.org/10.1007/BF00343058

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