Volume 2, Issue 3, May 2013, Page: 109-114
Analysis of Thermal Ageing Effect (Hold Time - Crystallinity Rate - Mechanical Property) on High Density Polyethylene (HDPE)
Rabah Ferhoum, Laboratoire Elaboration et Caractérisation des Matériaux et Modélisation, université Mouloud MAMMERI de Tizi-Ouzou, Algeria
Meziane Aberkane, Laboratoire Elaboration et Caractérisation des Matériaux et Modélisation, université Mouloud MAMMERI de Tizi-Ouzou, Algeria
Mohand Ould ouali, Laboratoire Elaboration et Caractérisation des Matériaux et Modélisation, université Mouloud MAMMERI de Tizi-Ouzou, Algeria
Kamel Hachour, Laboratoire Elaboration et Caractérisation des Matériaux et Modélisation, université Mouloud MAMMERI de Tizi-Ouzou, Algeria
Received: Jun. 1, 2013;       Published: Jun. 20, 2013
DOI: 10.11648/j.ijmsa.20130203.17      View  3108      Downloads  274
Abstract
This work is devoted to the experimental study of thermal ageing effect on the large deformation stress–strain behaviour of PE100, tensions tests are conducted on this material samples submitted to a temperature of 90°C during different hold times. It is found that thermal ageing causes an increase of all properties measured, including crystallinity, melting temperature, Young Modulus, yield stress and stress at break. We show, by different investigation techniques like X-rays diffraction, Transform Infrared Spectroscopy (FTIR), that increase of mechanical properties is not due to a chemical change but is due to an increase of the crystallinity rate commonly designated by the post-crystallization phenomena. DSC and DMA experiments show secondary crystallization, homogenization of primary crystals and decrease of the amorphous phase mobility.
Keywords
Thermal Ageing, HDPE, Finite Strain, Crystallinity
To cite this article
Rabah Ferhoum, Meziane Aberkane, Mohand Ould ouali, Kamel Hachour, Analysis of Thermal Ageing Effect (Hold Time - Crystallinity Rate - Mechanical Property) on High Density Polyethylene (HDPE), International Journal of Materials Science and Applications. Vol. 2, No. 3, 2013, pp. 109-114. doi: 10.11648/j.ijmsa.20130203.17
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