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Article

Highlighting Thermo-Elastic Effects in Confined Fluids

Laboratoire Léon Brillouin (CEA-CNRS), Université Paris-Saclay, CEA-Saclay, CEDEX, 91191 Gif-sur-Yvette, France
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Academic Editor: Eduardo Guzmán
Polymers 2021, 13(14), 2378; https://doi.org/10.3390/polym13142378
Received: 10 June 2021 / Revised: 11 July 2021 / Accepted: 12 July 2021 / Published: 20 July 2021
(This article belongs to the Special Issue Times of Polymers (TOP) and Composites)
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. View Full-Text
Keywords: liquid state; polymer melt; glass former; shear strain; shear elasticity; adiabatic transformation; thermo-elasticity liquid state; polymer melt; glass former; shear strain; shear elasticity; adiabatic transformation; thermo-elasticity
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MDPI and ACS Style

Kume, E.; Baroni, P.; Noirez, L. Highlighting Thermo-Elastic Effects in Confined Fluids. Polymers 2021, 13, 2378. https://doi.org/10.3390/polym13142378

AMA Style

Kume E, Baroni P, Noirez L. Highlighting Thermo-Elastic Effects in Confined Fluids. Polymers. 2021; 13(14):2378. https://doi.org/10.3390/polym13142378

Chicago/Turabian Style

Kume, Eni, Patrick Baroni, and Laurence Noirez. 2021. "Highlighting Thermo-Elastic Effects in Confined Fluids" Polymers 13, no. 14: 2378. https://doi.org/10.3390/polym13142378

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