Comptes Rendus
Influence of thermal aging on tensile and creep behavior of thermoplastic polyurethane
Comptes Rendus. Mécanique, Volume 339 (2011) no. 10, pp. 666-673.

Changes in mechanical and physical properties of polyurethane thermoplastic during aging at 70 °C and 90 °C were investigated. The loss weight response was analyzed by gravimetric measurements under these temperatures. Changes in appearance and morphology of TPU after thermal aging were revealed by optical microscopy. The prolongation of the thermal exposure time, up to 270 days, leads to a progressive increase in tensile strength. In fact, elastic modulus and stress at 200% of strain were increased with thermal exposure time. These results can be explained by the increase of thermal stability due to the increase of material rigidity and the decrease in chain mobility. The evolution of the mechanical properties from tensile tests seems to be well correlated to the creep behavior. Finally, Scanning Electron Microscopy (SEM) revealed the modification of TPU morphology fracture surface after thermal aging.

Received:
Accepted:
Published online:
DOI: 10.1016/j.crme.2011.07.003
Keywords: Thermoplastic polyurethane, Thermal aging, Mechanical properties

A. Boubakri 1; N. Haddar 1; K. Elleuch 1; Y. Bienvenu 2

1 Unité de recherche de chimie industrielle et matériaux, URCIM – ENIS, BP 1173-3038, Sfax, Tunisia
2 Centre des matériaux P.M. Fourt, École des Mines de Paris, 91003 Evry cedex, France
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A. Boubakri; N. Haddar; K. Elleuch; Y. Bienvenu. Influence of thermal aging on tensile and creep behavior of thermoplastic polyurethane. Comptes Rendus. Mécanique, Volume 339 (2011) no. 10, pp. 666-673. doi : 10.1016/j.crme.2011.07.003. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2011.07.003/

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