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SUMMARY:Molecular Optical Probes to Bridge Polymer Physics and Mechanics -
  Professor Costantino Creton - CNRS research director & VP research of the
  ESPCI Paris - PSL
DTSTART:20251127T140000Z
DTEND:20251127T150000Z
UID:TALK240043@talks.cam.ac.uk
CONTACT:Sharon Connor
DESCRIPTION:In recent years\, mechanochemistry has imposed itself as a nov
 el promising chemical tool to bridge the gap between polymer physics and c
 ontinuum mechanics in soft materials. The suitable incorporation of force-
 sensitive molecules (mechanophores) in load-bearing positions in soft (ent
 ropic) polymer networks provided a tool to detect stresses and bond scissi
 on in 2D and 3D through the intensity of an optical signal. We will discus
 s  some recent results linking the optical signal detected upon mechanopho
 re activation with the applied mechanical load. Recent investigations have
  addressed questions\, such as detecting and quantifying stress fields in 
 soft materials and measuring quantitative damage by bond scission. This co
 uld be achieved in diverse mechanical loading situations such as failure i
 n uniaxial tension\, crack propagation during continuous loading or due to
  cyclic fatigue\, or crack initiation in uniaxial or triaxial tension.  In
  ideal cases\, the optical signal provides highly sensitive quantitative d
 etection\, enabling comparisons between different materials on the size an
 d intensity of molecular damage zones that would otherwise be undetectable
 .\n\n
LOCATION:Dept. of Chemistry\, Pfizer Lecture Theater
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