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Mechanochromism and optical remodeling of multi-network elastomers containing anthracene dimers††Electronic supplementary information (ESI) available. See DOI: 10.1039/c9sc02580d
- Source :
- Chemical Science
- Publication Year :
- 2019
- Publisher :
- Royal Society of Chemistry, 2019.
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Abstract
- Multi-network elastomers with a reformable sacrificial network containing mechanochemically sensitive anthracene-dimer cross-links manifest reversible mechanochromism and remodeling.<br />Multi-network elastomers are both stiff and tough by virtue of containing a pre-stretched stiff network that can rupture and dissipate energy under load. However, the rupture of this sacrificial network in all described covalent multi-network elastomers is irreversible. Herein, we describe the first example of multi-network elastomers with a reformable sacrificial network containing mechanochemically sensitive anthracene-dimer cross-links. These cross-links also make our elastomers mechanochromic, with coloration that is both persistent and reversible, because the fluorogenic moiety (anthracene dimer) is regenerated upon irradiation of the material. In proof-of-concept experiments we demonstrate the utility of incorporating anthracene dimers in the backbone of the sacrificial network for monitoring mechanochemical remodeling of multi-network elastomers under cycling mechanical load. Stretching or compressing these elastomers makes them fluorescent and irradiating them eliminates the fluorescence by regenerating anthracene dimers. Reformable mechanochromic cross-links, exemplified by anthracene dimers, hold potential for enabling detailed studies of the molecular origin of the unique mechanical properties of multi-network elastomers.
- Subjects :
- Chemistry
Subjects
Details
- Language :
- English
- ISSN :
- 20416539 and 20416520
- Volume :
- 10
- Issue :
- 36
- Database :
- OpenAIRE
- Journal :
- Chemical Science
- Accession number :
- edsair.pmid..........f317494eceb76eb6bbbe8263f675bb3c