TY - JOUR
T1 - Sliding friction with polymer brushes
AU - Tadmor, Rafael
AU - Janik, Joanna
AU - Klein, Jacob
AU - Fetters, Lewis J.
PY - 2003/1/1
Y1 - 2003/1/1
N2 - Using high-resolution shear force measurements, we examine in detail the frictional drag between rubbing surfaces bearing end-tethered polymeric surfactants (brushes). The drag attains a maximum on initial motion, attributed to elastic stretching of the chains, which falls by a cascade of relaxations to a value characteristic of kinetic friction. This has a very weak velocity dependence, attributed to chain moieties dragging within a self-regulating, mutual interpenetration zone. When sliding stops, the shear stress across the polymer layers decays logarithmically with time, consistent with the relaxation of a network of dangling ends.
AB - Using high-resolution shear force measurements, we examine in detail the frictional drag between rubbing surfaces bearing end-tethered polymeric surfactants (brushes). The drag attains a maximum on initial motion, attributed to elastic stretching of the chains, which falls by a cascade of relaxations to a value characteristic of kinetic friction. This has a very weak velocity dependence, attributed to chain moieties dragging within a self-regulating, mutual interpenetration zone. When sliding stops, the shear stress across the polymer layers decays logarithmically with time, consistent with the relaxation of a network of dangling ends.
UR - http://www.scopus.com/inward/record.url?scp=0142120741&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.91.115503
DO - 10.1103/PhysRevLett.91.115503
M3 - Article
C2 - 14525437
AN - SCOPUS:0142120741
SN - 0031-9007
VL - 91
JO - Physical Review Letters
JF - Physical Review Letters
IS - 11
ER -