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Mechanochromism and Mechanical-Force-Triggered Cross-Linking from a Single Reactive Moiety Incorporated into Polymer Chains
- Source :
- Angewandte Chemie (International ed. in English). 55(9)
- Publication Year :
- 2015
-
Abstract
- Incorporation of small reactive moieties, the reactivity of which depends on externally imposed load (so-called mechanophores) into polymer chains offers access to a broad range of stress-responsive materials. Here, we report that polymers incorporating spirothiopyran (STP) manifest both green mechanochromism and load-induced addition reactions in solution and solid. Stretching a macromolecule containing colorless STP converts it into green thiomerocyanine (TMC), the mechanically activated thiolate moiety of which undergoes rapid thiol-ene click reactions with certain reactive C=C bonds to form a graft or a cross-link. The unique dual mechanochemical response of STP makes it of potentially great utility both for the design of new stress-responsive materials and for fundamental studies in polymer physics, for example, the dynamics of physical and mechanochemical remodeling of loaded materials.
- Subjects :
- chemistry.chemical_classification
Addition reaction
010405 organic chemistry
02 engineering and technology
General Chemistry
Polymer
General Medicine
021001 nanoscience & nanotechnology
Mechanical force
010402 general chemistry
01 natural sciences
Catalysis
0104 chemical sciences
chemistry
Polymer chemistry
Moiety
Polymer physics
Reactivity (chemistry)
0210 nano-technology
Macromolecule
Subjects
Details
- ISSN :
- 15213773
- Volume :
- 55
- Issue :
- 9
- Database :
- OpenAIRE
- Journal :
- Angewandte Chemie (International ed. in English)
- Accession number :
- edsair.doi.dedup.....b3629e6d67de58fef5066fca3fc6606d