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Article Dans Une Revue Polymer Année : 2022

Elastocaloric effect: Impact of heat transfer on strain-induced crystallization kinetics of natural rubber

Résumé

When natural rubber is rapidly loaded and unloaded there occurs a variation of its temperature called the elastocaloric effect. The objective of this work was to determine whether this temperature variation could be responsible for a delay in strain-induced crystallization (SIC) kinetics and stress relaxation. To this end, the SIC kinetics of cross-linked natural rubber samples with different thicknesses was studied at constant elongation after adiabatic stretching using thermal, mechanical and in-situ WAXS characterizations. The coupling of these techniques revealed that, at a fixed elongation λ (between 5 and 6), the crystallization kinetics and stress relaxation were faster in the thinner sample (with a short heat exchange time constant), thus providing evidence that heat transfer affected the SIC kinetics and should be considered when interpreting experimental results.
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Dates et versions

hal-04187016 , version 1 (18-01-2024)

Identifiants

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Hiba Haissoune, J.-M. Chenal, Laurent Chazeau, Gaël Sebald, Isabelle Morfin, et al.. Elastocaloric effect: Impact of heat transfer on strain-induced crystallization kinetics of natural rubber. Polymer, 2022, 263, pp.125506. ⟨10.1016/j.polymer.2022.125506⟩. ⟨hal-04187016⟩
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