In-situ coupled mechanical/electrical investigations on conductive TPU/CB composites: Impact of thermo-mechanically induced structural reorganizations of soft and hard TPU domains on the coupled electro-mechanical properties - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Polymer Année : 2022

In-situ coupled mechanical/electrical investigations on conductive TPU/CB composites: Impact of thermo-mechanically induced structural reorganizations of soft and hard TPU domains on the coupled electro-mechanical properties

Bienvenu Atawa
  • Fonction : Auteur
Léa Maneval
  • Fonction : Auteur
Pierre Alcouffe
  • Fonction : Auteur
  • PersonId : 866678
Guillaume Sudre
  • Fonction : Auteur
Laurent David
Nathalie Sintes-Zydowicz
  • Fonction : Auteur
  • PersonId : 859446
Emmanuel Beyou
  • Fonction : Auteur
Anatoli Serghei

Résumé

In-situ coupled mechanical/electrical investigations on TPU-based composite materials filled with carbon black have been carried-out under continuous and cyclic mechanical loading, with simultaneous measurements of stress, strain and electrical conductivity in dependence on the strain rate and amplitude. The impact of mechanical deformation and thermal treatment on the structure/properties relationship has been investigated by employing SAXS/WAXS, DSC and TEM measurements. Higher conduction properties were obtained by a strain induced crystallization of TPU soft domains that impacted the local concentration of CB aggregates above the percolation threshold. The TPU hard domains were found to be more sensitive to thermal treatment: annealing at high temperature led to microcrystalline hard domains that strongly influenced the conductivity evolution upon mechanical deformation. Structural and morphological reorganizations induced by mechanical deformation and thermal treatment can be thus efficiently used to adjust the coupled electro-mechanical behavior of TPU-based composite materials.

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Matériaux
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Dates et versions

hal-04289882 , version 1 (16-11-2023)

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Bienvenu Atawa, Léa Maneval, Pierre Alcouffe, Guillaume Sudre, Laurent David, et al.. In-situ coupled mechanical/electrical investigations on conductive TPU/CB composites: Impact of thermo-mechanically induced structural reorganizations of soft and hard TPU domains on the coupled electro-mechanical properties. Polymer, 2022, 256, pp.125147. ⟨10.1016/j.polymer.2022.125147⟩. ⟨hal-04289882⟩

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