| Autor: |
Sahli, R., Hem, J., Crauste-Thibierge, C., Clément, F., Long, D, Ciliberto, S. |
| Rok vydání: |
2020 |
| Předmět: |
|
| Zdroj: |
Phys. Rev. Materials 4, 035601 (2020) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevMaterials.4.035601 |
| Popis: |
The polymer relaxation dynamic of a sample, stretched up to the stress hardening regime, is measured, at room temperature, as a function of the strain $\lambda$ for a wide range of the strain rate $\dot\gamma$, by an original dielectric spectroscopy set up. The mechanical stress modies the shape of the dielectric spectra mainly because it affects the dominant polymer relaxation time $\tau$, which depends on $\lambda$ and is a decreasing function of $\dot\gamma$. The fastest dynamics is not reached at yield but in the softening regime. The dynamics slows down during the hardening, with a progressive increase of $\tau$. A small inuence of $\dot\gamma$ and $\lambda$ on the dielectric strength cannot be excluded. |
| Databáze: |
arXiv |
| Externí odkaz: |
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