期刊
ACS MACRO LETTERS
卷 3, 期 2, 页码 141-145出版社
AMER CHEMICAL SOC
DOI: 10.1021/mz400600r
关键词
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资金
- National Natural Science Foundation of China [21074103]
- Fundamental Research Funds for the Central Universities [2010121018]
- Scientific Research Foundation for Returned Scholars
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.
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