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.
Accepted:
Published online:
A. Boubakri 1; N. Haddar 1; K. Elleuch 1; Y. Bienvenu 2
@article{CRMECA_2011__339_10_666_0, author = {A. Boubakri and N. Haddar and K. Elleuch and Y. Bienvenu}, title = {Influence of thermal aging on tensile and creep behavior of thermoplastic polyurethane}, journal = {Comptes Rendus. M\'ecanique}, pages = {666--673}, publisher = {Elsevier}, volume = {339}, number = {10}, year = {2011}, doi = {10.1016/j.crme.2011.07.003}, language = {en}, }
TY - JOUR AU - A. Boubakri AU - N. Haddar AU - K. Elleuch AU - Y. Bienvenu TI - Influence of thermal aging on tensile and creep behavior of thermoplastic polyurethane JO - Comptes Rendus. Mécanique PY - 2011 SP - 666 EP - 673 VL - 339 IS - 10 PB - Elsevier DO - 10.1016/j.crme.2011.07.003 LA - en ID - CRMECA_2011__339_10_666_0 ER -
%0 Journal Article %A A. Boubakri %A N. Haddar %A K. Elleuch %A Y. Bienvenu %T Influence of thermal aging on tensile and creep behavior of thermoplastic polyurethane %J Comptes Rendus. Mécanique %D 2011 %P 666-673 %V 339 %N 10 %I Elsevier %R 10.1016/j.crme.2011.07.003 %G en %F CRMECA_2011__339_10_666_0
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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