Dissipation characteristics of adhesive kinetic friction on amorphous polymer surfaces

The results of adhesion and friction experiments are compared with those of a simplified formula based on power-law or logarithmic approximations of a previous adhesive friction model. The velocity dependence of the adhesive shear stress at low sliding velocities follows a power law, and the exponents for adhesive contact and sliding are similar. The primary and secondary contributors to adhesive friction are the adhesive shear resistance of the interface and the dissipation of reattachment folds near the trailing edge. The results provide additional evidence supporting the assumptions in our earlier frictional model.

► We compare adhesive contact and friction experiments with our friction model.
► The velocity dependences of the adhesive shear stress follow a power law at low speed sliding.
► The power-law exponents for adhesive contact and sliding are similar.
► The exponent depends on the conformation of the polymer chain and contact pressure.