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Title
Japanese: 
English:Photoinduced Regulation of the Heat Resistance in Polymer Networks with Diarylethene-Conjugated Reversible Covalent Cross-Links 
Author
Japanese: 木田淳平, 青木大輔, 大塚英幸.  
English: Jumpei Kida, Daisuke Aoki, Hideyuki Otsuka.  
Language English 
Journal/Book name
Japanese: 
English:ACS Macro Letters 
Volume, Number, Page Vol. 8    No. 1    pp. 1-6
Published date Jan. 15, 2019 
Publisher
Japanese: 
English: 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
Official URL https://pubs.acs.org/doi/full/10.1021/acsmacrolett.8b00876
 
Abstract A cross-linker with a diarylethene-conjugated Diels–Alder adduct (DAE/DA) was synthesized and applied in a radical polymerization system to afford polymer networks whose dynamic nature can be changed reversibly by photoirradiation. Free-radical polymerization of hexyl methacrylate and the DAE/DA-based cross-linker furnished an insoluble and transparent poly(hexyl methacrylate) network with DAE/DA moieties at their cross-linking points, which undergo de-cross-linking via a thermally induced retro-DA reaction upon heating. The photoregulation of such a thermal de-cross-linking reaction in DAE/DA-based polymer networks was demonstrated by swelling experiments and tensile tests, revealing drastic changes in the heat resistance and mechanical properties upon exposure to UV–vis irradiation.

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