Bulletin of the American Physical Society
APS March Meeting 2021
Volume 66, Number 1
Monday–Friday, March 15–19, 2021; Virtual; Time Zone: Central Daylight Time, USA
Session F64: Polymeric Networks, Elastomers and Gels
11:30 AM–2:30 PM,
Tuesday, March 16, 2021
Sponsoring
Units:
DPOLY GSNP DSOFT
Chair: Bradley Olsen, Massachusetts Institute of Technology MIT
Abstract: F64.00005 : Mechanochemistry as a Tool to Study Cavitation in Multiple-Network Elastomers*
12:18 PM–12:30 PM
Live
Presenter:
Gabriel Sanoja
(ESPCI Paris)
Authors:
Gabriel Sanoja
(ESPCI Paris)
Xavier Morelle
(ESPCI Paris)
Sylvie Castagnet
(ENSMA)
Costantino Creton
(ESPCI Paris)
Here, by incorporating mechanofluorescent damage-activated probes in elastomers, we are able to visualize cavitation-induced damage by polymer chain scission at the early stages of fracture. We nucleate cavities by rapid decompression of hydrogen-saturated elastomers and then examine damage via fluorescence microscopy. Using this tool, we demonstrate that cavity expansion is an irreversible fracture process that occurs via nucleation and propagation of randomly oriented penny-shape cracks. As a result, energy dissipation mechanisms that lead to toughening, like sacrificial bonds in multiple-networks, also improve cavitation resistance.
*This work was supported by the European Research Council (ERC) under the European Union’s Horizon 2020 Research and Innovation Program (Grant Agreement No 695351 – CHEMECH)
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