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Morelle XP, Sanoja GE, Castagnet S, et al. 3D fluorescent mapping of invisible molecular damage after cavitation in hydrogen exposed elastomers. Soft Matter. 2021;17(16):4266-4274doi: 10.1039/d1sm00325a.
Morelle, X. P., Sanoja, G. E., Castagnet, S., & Creton, C. (2021). 3D fluorescent mapping of invisible molecular damage after cavitation in hydrogen exposed elastomers. Soft matter, 17(16), 4266-4274. https://doi.org/10.1039/d1sm00325a
Morelle, Xavier P, et al. "3D fluorescent mapping of invisible molecular damage after cavitation in hydrogen exposed elastomers." Soft matter vol. 17,16 (2021): 4266-4274. doi: https://doi.org/10.1039/d1sm00325a
Morelle XP, Sanoja GE, Castagnet S, Creton C. 3D fluorescent mapping of invisible molecular damage after cavitation in hydrogen exposed elastomers. Soft Matter. 2021 Apr 28;17(16):4266-4274. doi: 10.1039/d1sm00325a. PMID: 33908597.
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Soft Matter. 2021 Apr 28;17(16):4266-4274. doi: 10.1039/d1sm00325a.

3D fluorescent mapping of invisible molecular damage after cavitation in hydrogen exposed elastomers.

Soft matter

Xavier P Morelle, Gabriel E Sanoja, Sylvie Castagnet, Costantino Creton

Affiliations

  1. SIMM, ESPCI Paris, Université PSL, CNRS, Sorbonne Université, 10 Rue Vauquelin, 75005 Paris, France. [email protected].
  2. Institut Pprime (UPR 3346 CNRS - ENSMA - Université de Poitiers), Department of Physics and Mechanics of Materials, 1 Avenue Clément Ader, BP 40109, 86961 Futuroscope Cedex, France.
  3. SIMM, ESPCI Paris, Université PSL, CNRS, Sorbonne Université, 10 Rue Vauquelin, 75005 Paris, France. [email protected] and Global Station for Soft Matter, Global Institution for Collaborative Research and Education, Hokkaido University, Sapporo, Japan.

PMID: 33908597 DOI: 10.1039/d1sm00325a

Abstract

Elastomers saturated with gas at high pressure suffer from cavity nucleation, inflation, and deflation upon rapid or explosive decompression. Although this process often results in undetectable changes in appearance, it causes internal damage, hampers functionality (e.g., permeability), and shortens lifetime. Here, we tag a model poly(ethyl acrylate) elastomer with π-extended anthracene-maleimide adducts that fluoresce upon network chain scission, and map in 3D the internal damage present after a cycle of gas saturation and rapid decompression. Interestingly, we observe that each cavity observable during decompression results in a damaged region, the shape of which reveals a fracture locus of randomly oriented penny-shape cracks (i.e., with a flower-like morphology) that contain crack arrest lines. Thus, cavity growth likely proceeds discontinuously (i.e., non-steadily) through the stable and unstable fracture of numerous 2D crack planes. This non-destructive methodology to visualize in 3D molecular damage in polymer networks is novel and serves to understand how fracture occurs under complex 3D loads, predict mechanical aging of pristine looking elastomers, and holds potential to optimize cavitation-resistance in soft materials.

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