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Novel Sm(PPh2)2 initiator for the synthesis of poly(ε-caprolactone) with linear and star-shaped structures§

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Summary

Divalent samarium bis(phosphido) complex Sm(PPh2)2 was first applied as an initiator for the ring-opening polymerization of ε-caprolactone (ε-CL). In comparison to samarium diiodide (SmI2), this Sm(II) complex exhibited much higher activity and yielded poly(ε-CL) with higher molecular weight. At the same time, an in-situ generated tetrafunctional samarium enolate from the reduction of 1,1,1,1-tetra(2-bromoisobutyryloxymethyl)methane with Sm(PPh2)2 or SmI2 has proven to initiate the polymerization of ε-CL under mild conditions. The resulting linear and star-shaped poly(ε-CL)s have been characterized by 1H NMR, GPC, and SLS.

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Authors and Affiliations

  1. Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, P.R.China e-mail: lmjiang@mail.hz.zj.cn, Tel: 86-571-87951059, Fax: 86-571-87951773, , , , , , CN

    Lina Xu, Liming Jiang, Weilin Sun & Zhiquan Shen

  2. State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P.R.China, , , , , , CN

    Shengming Ma

Authors
  1. Lina Xu
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  2. Liming Jiang
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  3. Weilin Sun
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  4. Zhiquan Shen
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  5. Shengming Ma
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Additional information

Received: 23 May 2002 /Revised version: 15 July 2002/ Accepted: 19 July 2002

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Xu, L., Jiang, L., Sun, W. et al. Novel Sm(PPh2)2 initiator for the synthesis of poly(ε-caprolactone) with linear and star-shaped structures§. Polymer Bulletin 49, 17–23 (2002). https://doi.org/10.1007/s00289-002-0077-0

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  • DOI: https://doi.org/10.1007/s00289-002-0077-0

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