Visible Light-driven Self-healable Mechanochromic Polyurethanes  

作　　者：HAN Jinpeng YUAN Yuan CHEN Yulan 

机构地区：[1]Tianjin Key Laboratory of Molecular Optoelectronic Science,Department of Chemistry,Tianjin University,Tianjin 300354,P.R.China [2]State Key Laboratory of Supramolecular Structure and Materials,College of Chemistry,Jilin University,Changchun 130012,P.R.China

出　　处：《Chemical Research in Chinese Universities》2023年第5期757-762,共6页高等学校化学研究（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(Nos.21734006,21975178 and 22275068);the Open Project of the State Key Laboratory of Supramolecular Structure and Materials,and the National Key Research and Development Program of China(No.2022YFF1202902)。

摘　　要：Polyurethanes incorporating spiropyran(SP)and diselenide(DiSe)in the main chain,which are confined in different hard segments are developed.Visible light-driven diselenide metathesis and mechanically induced ring opening of SP offer self-healing and mechanochromic properties of the polymers,respectively.Delicate selection of the polymer backbone is found essential to promote the dual functions.In particular for polyurethane with SP coupled into 4,4'-methylenebis(cyclohexyl isocyanate)and DiSe linked with isophorone diisocyanate,excellent mechanical,mechanochromic and self-healing properties are estimated.Moreover,combining self-healing and self-reporting moieties in one chain allows the discrimination of different healing mechanisms,including bond formation and chain entanglement,in a visualized way.

关 键 词：SELF-HEALING SELF-REPORTING POLYURETHANE Mechano-chromic DISELENIDE 

分 类 号：O63[理学—高分子化学]