The degradation of polymers has a great influence on their characteristics. Two kinds of processes may be distinguished, physical and chemical. Both are strongly linked. The degradation may be for example induced by UV irradiation, thermal ageing, physico-chemical attacks (water, oxygen, etc.), and mechanical stress. To investigate the thermal ageing effect on the large deformation stress-strain behaviour of PE100, tensions tests were conducted on this material samples submitted to a temperature of 90°C during different hold times. These tests show that thermal ageing leads to an increase of the mechanical properties like the Young Modulus, the yield stress and the stress at break. We show in our work, by different investigations techniques like X-rays diffraction, Transform Infrared Spectroscopy (FTIR), that this increase of mechanical properties is not due to a chemical changes but is due to an increase of the rate of the crystallinity commonly designated by the post-crystallization phenomena.
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ASME 2012 11th Biennial Conference on Engineering Systems Design and Analysis
July 2–4, 2012
Nantes, France
Conference Sponsors:
- International
ISBN:
978-0-7918-4486-1
PROCEEDINGS PAPER
The Thermal Ageing Effect on Viscoplastic Behaviour of High Density Polyethylene (HDPE)
Rabah Ferhoum,
Rabah Ferhoum
Université Mouloud Mammeri de Tizi-Ouzou, Tizi Ouzou, Algeria
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Meziane Aberkane,
Meziane Aberkane
Université Mouloud Mammeri de Tizi-Ouzou, Tizi Ouzou, Algeria
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Mohand Ould Ouali,
Mohand Ould Ouali
Université Mouloud Mammeri de Tizi-Ouzou, Tizi Ouzou, Algeria
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Kamel Hachour
Kamel Hachour
Université Mouloud Mammeri de Tizi-Ouzou, Tizi Ouzou, Algeria
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Rabah Ferhoum
Université Mouloud Mammeri de Tizi-Ouzou, Tizi Ouzou, Algeria
Meziane Aberkane
Université Mouloud Mammeri de Tizi-Ouzou, Tizi Ouzou, Algeria
Mohand Ould Ouali
Université Mouloud Mammeri de Tizi-Ouzou, Tizi Ouzou, Algeria
Kamel Hachour
Université Mouloud Mammeri de Tizi-Ouzou, Tizi Ouzou, Algeria
Paper No:
ESDA2012-82548, pp. 51-56; 6 pages
Published Online:
August 12, 2013
Citation
Ferhoum, R, Aberkane, M, Ould Ouali, M, & Hachour, K. "The Thermal Ageing Effect on Viscoplastic Behaviour of High Density Polyethylene (HDPE)." Proceedings of the ASME 2012 11th Biennial Conference on Engineering Systems Design and Analysis. Volume 3: Advanced Composite Materials and Processing; Robotics; Information Management and PLM; Design Engineering. Nantes, France. July 2–4, 2012. pp. 51-56. ASME. https://doi.org/10.1115/ESDA2012-82548
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