Repeatable mechanochemical activation of dynamic covalent bonds in thermoplastic elastomers

Keiichi Imato; Takeshi Kanehara; Shiki Nojima; Tomoyuki Ohishi; Yuji Higaki; Atsushi Takahara; Hideyuki Otsuka

doi:10.1039/c6cc04767j

Repeatable mechanochemical activation of dynamic covalent bonds in thermoplastic elastomers

Chem Commun (Camb). 2016 Aug 18;52(69):10482-5. doi: 10.1039/c6cc04767j.

Authors

Keiichi Imato¹, Takeshi Kanehara², Shiki Nojima², Tomoyuki Ohishi³, Yuji Higaki³, Atsushi Takahara⁴, Hideyuki Otsuka⁵

Affiliations

¹ Department of Chemical Science and Engineering, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan. otsuka@polymer.titech.ac.jp and Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.
² Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.
³ Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.
⁴ Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan and Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.
⁵ Department of Chemical Science and Engineering, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan. otsuka@polymer.titech.ac.jp.

PMID: 27424868
DOI: 10.1039/c6cc04767j

Abstract

Repeated mechanical scission and recombination of dynamic covalent bonds incorporated in segmented polyurethane elastomers are demonstrated by utilizing a diarylbibenzofuranone-based mechanophore and by the design of the segmented polymer structures. The repeated mechanochemical reactions can accompany clear colouration and simultaneous fading.