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Hyperbranched Polycoumarates with Photofunctional Multiple Shape Memory

Authors

  • Dr. Si-Qian Wang,

    1. School of Materials Science, Advanced Institute of Science and Technology, 1-1Asahidai, Nomi, Ishikawa 923-1292 (Japan)
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  • Prof. Daisaku Kaneko,

    1. Department of Applied Chemistry, Faculty of Engineering, Kyushu Institute of Technology, Building No.9, 5F-5, 1-1, Sensui-cho, Tobata-ku, Kitakyushu-shi, Fukuoka, 804-8550 (Japan)
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  • Dr. Maiko Okajima,

    1. School of Materials Science, Advanced Institute of Science and Technology, 1-1Asahidai, Nomi, Ishikawa 923-1292 (Japan)
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  • Dr. Katsuaki Yasaki,

    1. School of Materials Science, Advanced Institute of Science and Technology, 1-1Asahidai, Nomi, Ishikawa 923-1292 (Japan)
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  • Prof. Seiji Tateyama,

    1. School of Materials Science, Advanced Institute of Science and Technology, 1-1Asahidai, Nomi, Ishikawa 923-1292 (Japan)
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  • Prof. Tatsuo Kaneko

    Corresponding author
    1. School of Materials Science, Advanced Institute of Science and Technology, 1-1Asahidai, Nomi, Ishikawa 923-1292 (Japan)
    • School of Materials Science, Advanced Institute of Science and Technology, 1-1Asahidai, Nomi, Ishikawa 923-1292 (Japan)

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  • This work was financially supported by Advanced Low Carbon Technology Research and Development Program from Japan Science and Technology Agency (JST-ALCA, grant number 5100270).

Abstract

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In good shape: The films of hyperbranched polycoumarate derivatives can undergo a reversible [2+2] cycloaddition under irradiation of UV light and behave like photomechanical elastomers. From a predetermined original shape A the photonically and thermally memorized shapes B and C were obtained. The original shape was recovered by photoirradiation (see picture; Tg=glass transition temperature).

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