Characterization of strain bursts in high density polyethylene by means of a novel nano creep test

Characterization of Polyethylene Using a New Test Method Based on Stress Response to Relaxation and Recovery

“…Based on Equations (10) and (11), the corresponding activation energies for processes 1 and 2 are 28.96 and 73.25 kJ/mol, respectively, which can be used to quantify the energy barriers for relaxation introduced in the RR test. These values are in the same order of magnitude as those reported in the literature, such as Wilhelm et al[53] who used creep test data for PE100 pipe resin and determined the activation energy for one Eyring's process to be 30 kJ/mol and Truss et al[54] who used torsion test data for HDPE with the density of 0.972 g/cm 3 and determined the activation energies for yielding using two Eyring's process connected in parallel to be 243 and 100 kJ/mol.…”

“…Based on Equations (10) and (11), the corresponding activation energies for processes 1 and 2 are 28.96 and 73.25 kJ/mol, respectively, which can be used to quantify the energy barriers for relaxation introduced in the RR test. These values are in the same order of magnitude as those reported in the literature, such as Wilhelm et al[53] who used creep test data for PE100 pipe resin and determined the activation energy for one Eyring's process to be 30 kJ/mol and Truss et al[54] who used torsion test data for HDPE with the density of 0.972 g/cm3 and determined the activation energies for yielding using two Eyring's process connected in parallel to be 243 and 100 kJ/mol.As suggested by André and Cruz-Pinto[55], in addition to the dependence on materials, different loading modes may also yield different values for the activation energies. Therefore, a further study on the effect of the loading mode on the activation energy will be conducted based on the principle of the RR test presented here.…”

Effect of Temperature Ageing on Injection Molded High-Density Polyethylene Parts Modified by Accelerated Electrons

“…Pelto et al [21] studied the influence of different types of nanofillers on the tribological properties of the surface of HDPE composites. In some cases, the coefficient of friction and wear has been reduced with the addition of a small amount of nanofiller [21][22][23][24][25][26][27]. In certain cases, it is appropriate to modify the thermal conductivity, which is generally poor for all polymeric materials, as these are thermal insulators.…”