Repeatable Photoinduced Self-Healing of Covalently Cross-Linked Polymers through Reshuffling of Trithiocarbonate Units

Authors

  • Yoshifumi Amamoto,

    1. Center for Macromolecular Engineering, Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA 15213 (USA), Fax: (+1) 412-268-6897
    2. Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395 (Japan)
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  • Jun Kamada,

    1. Center for Macromolecular Engineering, Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA 15213 (USA), Fax: (+1) 412-268-6897
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  • Prof. Hideyuki Otsuka,

    1. Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395 (Japan)
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  • Prof. Atsushi Takahara,

    1. Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395 (Japan)
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  • Prof. Krzysztof Matyjaszewski

    Corresponding author
    1. Center for Macromolecular Engineering, Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA 15213 (USA), Fax: (+1) 412-268-6897
    • Center for Macromolecular Engineering, Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA 15213 (USA), Fax: (+1) 412-268-6897
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  • We thank the NSF (DMR-0969301), DoE (ER45998), and Mitsui Chemicals for financial support. We thank Prof. Frederick Lanni, Prof. Rongchao Jin, and Dr. Yungwan Kwak for stimulating discussions as well as Yaozhong Zhang for the experimental assistance with UV measurements. Y.A. acknowledges the financial support of a Grant-in-Aid for JSPS Fellows.

Abstract

original image

Well-healed: Polymers cross-linked with trithiocarbonate (TTC) units were prepared by a RAFT polymerization. The repeatable self-healing systems or macroscopic fusions were accomplished by UV irradiation of the cross-linked polymer in solution and in the bulk state. The macroscopic fusion of completely separated parts was successful (see pictures, BA=n-butyl acrylate).

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