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Communication Dans Un Congrès Année : 2021

From hidden shear-elasticity to opto and thermo-elasticity in confinedpolymer meltsand viscous liquids

Résumé

The recent identification of a finite shear elasticity in mesoscopic fluids has motivated the search of other solid-like properties of liquids. We present an innovative thermal approach of liquids. We identify a dynamic thermo-elastic mesoscopic behavior by building the thermal image produced by different liquids upon applying a low frequency mechanical shear field. We selected three fluids: a low molecular weight polybutylacrylate (PBuA), polypropyleneglycol (PPG), and glycerol. We demonstrate that a part of the energy of the shear strain is converted in cold and hot shear bands varying synchronously with the applied shear field. This thermodynamic change suggests a coupling to shear elastic modes in agreement with the low frequency shear elasticity theoretically foreseen and experimentally demonstrated
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Dates et versions

hal-03742107 , version 1 (02-08-2022)

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  • HAL Id : hal-03742107 , version 1

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Laurence Noirez. From hidden shear-elasticity to opto and thermo-elasticity in confinedpolymer meltsand viscous liquids. TOP 2021 - 10th International conference on times of polymers and composites, Sep 2021, Ischia, Italy. ⟨hal-03742107⟩
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