Static and Dynamic Properties of Semi-Crystalline Polyethylene
AbstractProperties of extruded polymers are strongly affected by molecular structure. For two different semi-crystalline polymers, low-density polyethylene (LDPE) and ultra-high molecular weight polyethylene (UHMWPE), this investigation measures the elastic modulus, plastic flow stress and strain-rate dependence of yield stress. Also, it examines the effect of molecular structure on post-necking tensile fracture. The static and dynamic material tests reveal that extruded UHMWPE has a somewhat larger yield stress and much larger strain to failure than LDPE. For both types of polyethylene, the strain at tensile failure decreases with increasing strain-rate. For strain-rates 0.001–3400 s−1, the yield stress variation is accurately represented by the Cowper–Symonds equation. These results indicate that, at high strain rates, UHMWPE is more energy absorbent than LDPE as a result of its long chain molecular structure with few branches. View Full-Text
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Xu, M.-M.; Huang, G.-Y.; Feng, S.-S.; McShane, G.J.; Stronge, W.J. Static and Dynamic Properties of Semi-Crystalline Polyethylene. Polymers 2016, 8, 77.
Xu M-M, Huang G-Y, Feng S-S, McShane GJ, Stronge WJ. Static and Dynamic Properties of Semi-Crystalline Polyethylene. Polymers. 2016; 8(4):77.Chicago/Turabian Style
Xu, Ming-ming; Huang, Guang-yan; Feng, Shun-shan; McShane, Graham J.; Stronge, William J. 2016. "Static and Dynamic Properties of Semi-Crystalline Polyethylene." Polymers 8, no. 4: 77.
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