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Effects of strain rate and temperature on the mechanical behavior of high-density polyethylene

Article dans une revue avec comité de lecture
Author
LAMRI, Abderrahmane
ccSHIRINBAYAN, Mohammadali
ccPEREIRA, Michaël
TRUFFAULT, Laurianne
ccTCHARKHTCHI, Abbas
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
ccFITOUSSI, Joseph
ccBAKIR, Farid
134975 Laboratoire de Dynamique des Fluides [DynFluid]

URI
http://hdl.handle.net/10985/18461
DOI
10.1002/app.48778
Date
2020
Journal
Journal of Applied Polymer Science

Abstract

The objective of this work is to initiate the discussion about multiphysics relationships between the molten and solid states of high-density polyethylene (HDPE). The extrusion and the injection processes are employed to prepare samples, and the experimental procedures, using differential scanning calorimetry, dynamic thermomechanical analysis (DMTA), thermal gravimetric analysis, and rheological measurements, are defined to choose the optimal variables. After different characterizations, the extrusion and injection temperatures of 220 and 230 °C have been chosen. To investigate the viscoelastic behavior of HDPE, the DMTA is used. To perform the high strain rate tensile tests, tensile machine was equipped with a specific furnace. Two temperatures, −20 and 20 °C, with strain rates varying from 0.001 to 100 seconds−1 were used to compare the flow characteristics. Results showed that by increasing the strain rate the molecular mobility of the HDPE chains is decreased. In addition, to the tests at −20 °C, the increase of Young's modulus can be properly observed, under high strain rates.

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  • Dynamique des Fluides (DynFluid)
  • Laboratoire Procédés et Ingénierie en Mécanique et Matériaux (PIMM)

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