the influence of crosslink density on the failure behavior in amorphous polymers by molecular dynamics simulations
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2016
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Abstract
The crosslink density plays a key role in the mechanical response of the amorphous polymers in previous experiments. However, the mechanism of the influence is still not clear. In this paper, the influence of crosslink density on the failure behavior under tension and shear in amorphous polymers is systematically studied using molecular dynamics simulations. The present results indicate that the ultimate stresses and the broken ratios (the broken bond number to all polymer chain number ratios) increase, as well as the ultimate strains decrease with increasing crosslink density. The strain concentration is clearer with the increase of crosslink density. In other words, a higher crosslink density leads to a higher strain concentration. Hence, the higher strain concentration further reduces the fracture strain. This study implies that the mechanical properties of amorphous polymers can be dominated for different applications by altering the molecular architecture.
| Reference Key |
zhao2016materialsthe
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|---|---|
| Authors | ;Junhua Zhao;Peishi Yu;Shuhong Dong |
| Journal | Nature Materials |
| Year | 2016 |
| DOI |
10.3390/ma9040234
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