TY  - JOUR
AU  - Sivebaek, I. M.
AU  - Samoilov, V. N.
AU  - Persson, B. N. J.
TI  - Frictional properties of confined polymers
JO  - The European physical journal / E
VL  - 27
SN  - 1292-8941
CY  - Berlin
PB  - Springer
M1  - PreJuSER-2766
SP  - 37 - 46
PY  - 2008
N1  - A part of the present work was carried out in frames of the ESF program "Nanotribology (NATRIBO)". Two of the authors (I.M.S. and V.N.S.) acknowledge support from IFF, FZ-Julich, hospitality and help of the staff during their research visits.
AB  - 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.
KW  - Carbon: chemistry
KW  - Computer Simulation
KW  - Elasticity
KW  - Equipment Design
KW  - Friction
KW  - Models, Theoretical
KW  - Physics: methods
KW  - Polymers: chemistry
KW  - Pressure
KW  - Stress, Mechanical
KW  - Surface Properties
KW  - Polymers (NLM Chemicals)
KW  - Carbon (NLM Chemicals)
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
C6  - pmid:19230226
UR  - <Go to ISI:>//WOS:000259821300005
DO  - DOI:10.1140/epje/i2008-10349-8
UR  - https://juser.fz-juelich.de/record/2766
ER  -