Mechanical Activation of Mechanophore Enhanced by Strong Hydrogen Bonding Interactions

被引:106
作者
Chen, Yinjun [1 ]
Zhang, Huan [1 ]
Fang, Xiuli [1 ]
Lin, Yangju [1 ]
Xu, Yuanze [1 ]
Weng, Wengui [1 ]
机构
[1] Xiamen Univ, Dept Chem, Coll Chem & Engn, Xiamen 361005, Peoples R China
基金
中国国家自然科学基金;
关键词
THERMOPLASTIC ELASTOMERS; POLYMER; SCISSION; CRYSTALLIZATION; COPOLYMERS; INCLUSION; CATALYSTS; FILMS; END;
D O I
10.1021/mz400600r
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
A mechanically active spiropyran (SP) mechanophore is incorporated into the backbone of prepolymer which is further end-capped with ureidopyrimidinone (UPy) or urethane. Strong mechanochromic reaction of SP arises in the bulk films of UPy containing materials whereas much weaker activation occurs in urethane containing counterparts, coincident with their stress strain responses. The difference in the magnitudes of supramolecular interactions leads to different degrees of chain orientation and strain induced crystallization (SIC) in the bulk and consequently distinct capabilities to transfer the load to the mechanophores. This study may aid the design of novel mechanoresponsive materials whose mechanoresponsiveness can be tailored by tuning supramolecular interactions.
引用
收藏
页码:141 / 145
页数:5
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