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Communication dans un congrès

Viscoelastic characterization; how to fill experimental gap between solid and liquid techniques

Abstract : Viscoelastic behaviors of polymers from liquid to solid state are investigated with techniques such as dynamic mechanical analysis (DMA) and rheometry. The time-temperature superposition principle permits to build master curves. WLF law can then be identified and implemented in numerical softwares to predict thermomechanical behaviors. Polycarbonate (PC) with a glass transition (Tg) around 150°C is tricky to characterize. DMA is limited as the rigidity drops around Tg and rheometry is delicate as the fluidity is not sufficient under Tg + 40°C. Data are obtained with DMA (tensile loading) for T ≤ Tg and with rheometry (shear loading) for T ≥ Tg +40°C. The aim is to fit them to obtain a master curve and identify a thermo mechanical behavior. The goal is to propose a new procedure combining two experimental techniques totally different and push the limit of their relevance domain.
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Communication dans un congrès
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https://hal-mines-paristech.archives-ouvertes.fr/hal-01113524
Contributeur : Magalie Prudon <>
Soumis le : jeudi 5 février 2015 - 17:02:24
Dernière modification le : jeudi 24 septembre 2020 - 17:22:55

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  • HAL Id : hal-01113524, version 1

Citation

Coraly Cuminatto, Jean-Luc Bouvard, Rudy Valette, Michel Vincent, Noëlle Billon. Viscoelastic characterization; how to fill experimental gap between solid and liquid techniques. ICEM16 - International Conference on Experimental Mechanics, Jul 2014, Cambridge, United Kingdom. ⟨hal-01113524⟩

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