Journal article
Frictional properties of confined polymers
We present molecular dynamics friction calculations for confined hydrocarbon solids with molecular lengths from 20 to 1400 carbon atoms. Two cases are considered: a) polymer sliding against a hard substrate, and b) polymer sliding on polymer. In the first setup the shear stresses are relatively independent of molecular length.
For polymer sliding on polymer the friction is significantly larger, and dependent on the molecular chain length. In both cases, the shear stresses are proportional to the squeezing pressure and finite at zero load, indicating an adhesional contribution to the friction force. The friction decreases when the sliding distance is of the order of the molecular length indicating a strong influence of molecular alignment during run-in.
The results of our calculations show good correlation with experimental work.
| Language: | English |
|---|---|
| Publisher: | Springer-Verlag |
| Year: | 2008 |
| Pages: | 37-46 |
| Journal subtitle: | Soft Matter |
| ISSN: | 1292895x and 12928941 |
| Types: | Journal article |
| DOI: | 10.1140/epje/i2008-10349-8 |
| ORCIDs: | Sivebæk, Ion Marius |
BEHAVIOR CURVED SOLID-SURFACES LAYERS LONG-RANGE ELASTICITY LUBRICATION FILMS PRESSURE SHEAR SLIP SMOOTH TRANSITION
31.15.Xv Molecular dynamics and other numerical methods 62.20.Qp Friction,tribology,and hardness 68.35.Af Atomic scale friction Biophysics/Biomedical Physics Carbon Complexity Computer Simulation Elasticity Equipment Design Friction Models, Theoretical Physical Chemistry Physics Polymer Sciences Polymers Pressure Soft Matter, Complex Fluids Stress, Mechanical Surface Properties Surfaces and Interfaces, Thin Films
