6533b7d7fe1ef96bd1268d84
RESEARCH PRODUCT
On the tribology and rheology of polymer brushes in good solvent conditions: a molecular dynamics study
T. KreerMartin H. Müsersubject
chemistry.chemical_classificationRange (particle radiation)Materials scienceNanotechnologySurfaces and InterfacesPolymerTribologyCondensed Matter PhysicsSurfaces Coatings and FilmsMolecular dynamicschemistryRheologyMechanics of MaterialsChemical physicsMaterials ChemistryLubricationShear stressRelaxation (physics)description
Tribological and rheological properties of two polymer brushes in relative sliding motion and good solvent conditions are investigated by means of molecular dynamics (MD) simulations. The lateral forces between the brushes are found to decrease logarithmically with increasing relative sliding velocity v0 over a range of more than one decade in v0. We also observe an almost logarithmic relaxation of the end-to-end distance vector that occurs after sliding is stopped. The coincidence of these logarithmic dependencies support the picture that friction between polymer brushes is small due to the retraction of the polymers from the interpenetration zone. The shear stress relaxes almost instantly in our simulations after sliding is stopped, unless poor solvent conditions are considered. © 2003 Elsevier Science B.V. All rights reserved.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2003-05-01 | Wear |