Static and Dynamic Properties of Semi-Crystalline Polyethylene

Xu, Mangmang; Huang, Guangyan; Feng, Shunshan; McShane, G.J.; Stronge, W. J.

doi:10.3390/polym8040077

Cited by 55 publications

(32 citation statements)

References 29 publications

(38 reference statements)

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“…It was shown that tensile properties were significantly dependent on the orientation of molecular structure originating from different morphologies developed during the polymer deformation process [ 6 ]. Anisotropy effect in tensile properties was also investigated through tension tests in 0°, 45°, and 90° relative to extrusion direction for two grades of polyethylene (LDPE and UHMWPE) [ 18 ]. No significant difference on tensile properties was observed among samples and it was concluded that the extruded polyethylene material is isotropic in terms of tensile behavior [ 18 ].…”

Section: Introductionmentioning

confidence: 99%

“…Anisotropy effect in tensile properties was also investigated through tension tests in 0°, 45°, and 90° relative to extrusion direction for two grades of polyethylene (LDPE and UHMWPE) [ 18 ]. No significant difference on tensile properties was observed among samples and it was concluded that the extruded polyethylene material is isotropic in terms of tensile behavior [ 18 ]. However, Grommes et al [ 19 ] reported significant anisotropy effect in elastic modulus for blow molded HDPE between extrusion direction and blowing direction (perpendicular to extrusion) for blow molded HDPE.…”

Section: Introductionmentioning

confidence: 99%

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Tensile Behavior of High-Density Polyethylene Including the Effects of Processing Technique, Thickness, Temperature, and Strain Rate

Amjadi¹,

Fatemi²

2020

Polymers

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The primary goal of this study was to investigate the monotonic tensile behavior of high-density polyethylene (HDPE) in its virgin, regrind, and laminated forms. HDPE is the most commonly used polymer in many industries. A variety of tensile tests were performed using plate-type specimens made of rectangular plaques. Several factors can affect the tensile behavior such as thickness, processing technique, temperature, and strain rate. Testing temperatures were chosen at −40, 23 (room temperature, RT), 53, and 82 °C to investigate temperature effect. Tensile properties, including elastic modulus, yield strength, and ultimate tensile strength, were obtained for all conditions. Tensile properties significantly reduced by increasing temperature while elastic modulus and ultimate tensile strength linearly increased at higher strain rates. A significant effect of thickness on tensile properties was observed for injection molding specimens at 23 °C, but no thickness effect was observed for compression molded specimens at either 23 or 82 °C. The aforementioned effects and discussion of their influence on tensile properties are presented in this paper. Polynomial relations for tensile properties, including elastic modulus, yield strength, and ultimate tensile strength, were developed as functions of temperature and strain rate. Such relations can be used to estimate tensile properties of HDPE as a function of temperature and/or strain rate for application in designing parts with this material.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Tensile Behavior of High-Density Polyethylene Including the Effects of Processing Technique, Thickness, Temperature, and Strain Rate

Amjadi¹,

Fatemi²

2020

Polymers

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“…Figure shows the typical stress–strain curves of semicrystalline thermoplastics. These curves have four characteristic behaviors: elastic, initial necking, cold drawing (plastic) regions, and fracture point . As shown in Figure (a), adding a higher concentration of PP to LDPE increased both the tensile strength, which is a measure of a material to withstand a tensile force and toughness property, which is the ability to absorb energy and undergo extensive plastic deformation without rupturing.…”

Section: Resultsmentioning

confidence: 97%

X‐ray irradiated LDPE/PP blends with high mechanical and dielectric performance

Alkan

Kılıç

Karabul

et al. 2018

J of Applied Polymer Sci

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In this study, the influences of polypropylene (PP) additive (varying from 20% to 80% wt) and low dose X‐ray irradiation (changing from 25 to 100 Gy) on the mechanical and dielectric properties of low‐density polyethylene (LDPE) were investigated. LDPE/PP film blends were prepared by hot press technique. While the highest Young modulus and tensile strength were observed for the 20%LDPE/80%PP blend at 25 Gy X‐ray irradiation, the same blend had the highest energy at break and percentage strain at break values for 50 Gy X‐ray exposure. These results also indicated a chain scission in the material. The differential scanning calorimetry curves also indicated a chain scission and crosslinking effects in the blends due to X‐ray irradiation. Hence, the higher concentration of PP additive and exposure of low dose X‐ray resulted in a polymer composite with high mechanical performance. On the other hand, the dielectric investigations revealed that the 25 Gy X‐ray irradiated 20%LDPE/80%PP blend may also attract attention for capacitor applications due to its increased static dielectric constant and reduced dielectric loss. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46571.

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“…However, the elastic-plastic constitutive model considering both strain rate effect and temperature effect was not studied in Ref. [8][9][10][11][12][13][14][15][16][17][18]. On this basis, the research considering the strain rate effect and temperature effect was carried out in the present paper.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Constitutive Model of Ultra-High Molecular Weight Polyethylene (UHMWPE): Considering the Temperature and Strain Rate Effects

Zhang

Zheng

et al. 2020

Polymers

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The temperature and strain rate significantly affect the ballistic performance of UHMWPE, but the deformation of UHMWPE under thermo-mechanical coupling has been rarely studied. To investigate the influences of the temperature and the strain rate on the mechanical properties of UHMWPE, a Split Hopkinson Pressure Bar (SHPB) apparatus was used to conduct uniaxial compression experiments on UHMWPE. The stress–strain curves of UHMWPE were obtained at temperatures of 20–100 °C and strain rates of 1300–4300 s−1. Based on the experimental results, the UHMWPE belongs to viscoelastic–plastic material, and a hardening effect occurs once UHMWPE enters the plastic zone. By comparing the stress–strain curves at different temperatures and strain rates, it was found that UHMWPE exhibits strain rate strengthening and temperature softening effects. By modifying the Sherwood–Frost model, a constitutive model was established to describe the dynamic mechanical properties of UHMWPE at different temperatures. The results calculated using the constitutive model were in good agreement with the experimental data. This study provides a reference for the design of UHMWPE as a ballistic-resistant material.

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Static and Dynamic Properties of Semi-Crystalline Polyethylene

Cited by 55 publications

References 29 publications

Tensile Behavior of High-Density Polyethylene Including the Effects of Processing Technique, Thickness, Temperature, and Strain Rate

Tensile Behavior of High-Density Polyethylene Including the Effects of Processing Technique, Thickness, Temperature, and Strain Rate

X‐ray irradiated LDPE/PP blends with high mechanical and dielectric performance

Dynamic Constitutive Model of Ultra-High Molecular Weight Polyethylene (UHMWPE): Considering the Temperature and Strain Rate Effects

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