Revue des sciences et sciences de l’ingénieur
Volume 6, Numéro 1, Pages 07-11
2016-12-01
Auteurs : Benmiloud N.h . Chabira S.f . Sebaa M .
Low density polyethylene films commonly used for greenhouses covering have been aged in sub-Saharan region. Mechanical characterization with a tensile test machine has been performed on polyethylene samples picked up at regular interval thorough the total duration of the aging protocol (0 to 6 months). Young's modulus, elongation at break and tensile strength are the different greatnesses which have allowed following the incidence of ageing on the mechanical properties. The viscoelastic properties were carried out on a creep apparatus. It has been observed that the film deforms according to several steps. They correspond to different flow types; such as instantaneous deformation, viscoelastic and viscoplastic deformation. All are affected with aging time in reason of the micro-structural changes undergone by the material.
LDPE, Weathering, Tensile strength, Viscoelesticity, Young’s modulus, Creep’s modulus.
بوسالم أحلام
.
عابد يوسف
.
ص 117-132.
Yahia Zeghoudi
.
pages 74-88.
Said Houari Amel
.
pages 257-268.
Lafane S.
.
Kerdja T.
.
Abdelli-messaci S.
.
Khereddine Y.
.
Kechouane M.
.
pages 53-58.