Abstract
Crosslinks occur in polymers following irradiation and are used in computational simulations to mimic the effects of chain tangling. Here, the effect of crosslink density on the tribological behavior of atomic-scale models of polyethylene and polytetrafluoroethylene is determined using classical molecular dynamics simulations. In the simulations, oriented crosslinked surfaces are slid in different directions over a range of applied normal loads. The results indicate that, at the same normal load, the friction force increases with increased crosslink density. In addition, the influence of randomized versus ordered crosslinking on the simulated tribological behavior is investigated. Finally, the influence of crosslink density on the simulated wear mechanisms of polyethylene and polytetrafluoroethylene is elucidated. The results have important implications for the atomic-scale modeling of friction at the interfaces of polymers that have been irradiated or contain entangled chains.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 193-201 |
| Number of pages | 9 |
| Journal | Tribology Letters |
| Volume | 42 |
| Issue number | 2 |
| DOIs | |
| State | Published - May 1 2011 |
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All Science Journal Classification (ASJC) codes
- Mechanics of Materials
- Mechanical Engineering
- Surfaces and Interfaces
- Surfaces, Coatings and Films
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Influence of the molecular level structure of polyethylene and polytetrafluoroethylene on their tribological response. / Chiu, Patrick Y.; Barry, Peter R.; Perry, Scott S.; Sawyer, W. Gregory; Phillpot, Simon R.; Sinnott, Susan B.
In: Tribology Letters, Vol. 42, No. 2, 01.05.2011, p. 193-201.Research output: Contribution to journal › Article
TY - JOUR
T1 - Influence of the molecular level structure of polyethylene and polytetrafluoroethylene on their tribological response
AU - Chiu, Patrick Y.
AU - Barry, Peter R.
AU - Perry, Scott S.
AU - Sawyer, W. Gregory
AU - Phillpot, Simon R.
AU - Sinnott, Susan B.
PY - 2011/5/1
Y1 - 2011/5/1
N2 - Crosslinks occur in polymers following irradiation and are used in computational simulations to mimic the effects of chain tangling. Here, the effect of crosslink density on the tribological behavior of atomic-scale models of polyethylene and polytetrafluoroethylene is determined using classical molecular dynamics simulations. In the simulations, oriented crosslinked surfaces are slid in different directions over a range of applied normal loads. The results indicate that, at the same normal load, the friction force increases with increased crosslink density. In addition, the influence of randomized versus ordered crosslinking on the simulated tribological behavior is investigated. Finally, the influence of crosslink density on the simulated wear mechanisms of polyethylene and polytetrafluoroethylene is elucidated. The results have important implications for the atomic-scale modeling of friction at the interfaces of polymers that have been irradiated or contain entangled chains.
AB - Crosslinks occur in polymers following irradiation and are used in computational simulations to mimic the effects of chain tangling. Here, the effect of crosslink density on the tribological behavior of atomic-scale models of polyethylene and polytetrafluoroethylene is determined using classical molecular dynamics simulations. In the simulations, oriented crosslinked surfaces are slid in different directions over a range of applied normal loads. The results indicate that, at the same normal load, the friction force increases with increased crosslink density. In addition, the influence of randomized versus ordered crosslinking on the simulated tribological behavior is investigated. Finally, the influence of crosslink density on the simulated wear mechanisms of polyethylene and polytetrafluoroethylene is elucidated. The results have important implications for the atomic-scale modeling of friction at the interfaces of polymers that have been irradiated or contain entangled chains.
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U2 - 10.1007/s11249-011-9763-0
DO - 10.1007/s11249-011-9763-0
M3 - Article
VL - 42
SP - 193
EP - 201
JO - Tribology Letters
JF - Tribology Letters
SN - 1023-8883
IS - 2
ER -