Thermal Aging Effect on Mechanical Properties of Polyurethane
TypeArticles dans des revues avec comité de lecture
This study concerns the effect of thermal aging on mechanical properties of polyurethane. Polyurethane samples were exposed at 85° and 120°C under inert atmosphere. Mechanical tests were carried out on these samples the aging period. Tensile tests were performed to see the effect of aging on elastic modulus (E), stress (σr), and strain (ϵr) at break. It was shown that there are two distinct periods. Due to aging, E and σr increase in the first period, then they decrease in the second period. ϵr decreases first and then increases. Fatigue tests were performed on unaged and aged samples. It was shown that the fatigue behavior of polyurethane (PU) is improved the same way during the first stage of aging. In the second step, the number of cycles to failure increases due to aging. The results show that aging has an important effect on mechanical properties of PU. The strain at break decreases during the first step of aging due to post-cross-linking and then increases due to chain scission in the network. Based on these results, the effect of cross-linking and chain scission on the mechanical properties of PU was discussed.
Files in this item
Showing items related by title, author, creator and subject.
ABDALLAH-ELHIRTSI, Sofiane; FITOUSSI, Joseph; RASHMI, Baralu-Jagannatha; PRASHANTHA, Kalappa; FARZANEH, Sedigheh; LACRAMPE, Marie-France; KRAWCZAK, Patricia; TCHARKHTCHI, Abbas (Wiley Online Library, 2015)In this work, an experimental investigation on a partial shape memory polymer (PSMP) which is transformed into shape memory material is presented. Multicycle shape memory tests are performed on thermoplastic polyurethane ...
TCHARKHTCHI, Abbas; ABDALLAH-ELHIRTSI, Sofiane; EBRAHIMI, Kambiz; FITOUSSI, Joseph; SHIRINBAYAN, Mohammadali; FARZANEH, Sedigheh (MDPI, 2014)In this study some new concepts regarding certain aspects related to shape memory polymers are presented. A blend of polylactic acid (PLA) (80%) and polybutylene succinate (PBS) (20%) was prepared first by extrusion, then ...
RIVIERE, Sylvain; KHELLADI, Sofiane; FARZANEH, Sedigeh; BAKIR, Farid; TCHARKHTCHI, Abbas (Wiley, 2013)Reactive rotational molding (RRM) is a process to manufacture hollow plastic articles. Comparing to rotational molding of thermoplastics, it decreases the process cycle time due to the reactivity of the system. However, ...
ESMAEILLOU, B; FEREIRRA, P; BELLENGER, Véronique; TCHARKHTCHI, Abbas (Wiley, 2012)Fatigue damage initiation of a PA66/glass fiber composite material is studied with interrupted tests carried out with an “alternative bending device” and a small applied strain. During the damage initiation period, no ...
ESMAEILLOU, B; FERREIRA, Paulo; BELLENGER, Véronique; TCHARKHTCHI, Abbas (WILEY, 2012)In this study, the fatigue behavior of polyamide 66 reinforced with short glass fibers and especially the role of glass fibers has been investigated under two kinds of cyclic loading. tension–tension fatigue tests with ...