(a) The unit cell structure of PE and (b) schematic of the PE polymer chain alignment.
The lateral forces, normal forces, and friction coefficients for perpendicular and parallel sliding in the PE polymer systems.
Snapshots of the PE system during perpendicular sliding (upper) and parallel sliding (lower), to produce the data shown in Fig. 2. To better see the change in the PE substrate, three striped regions are designated not by specific chains but by distance and are set to be opaque, while the other regions are set to be transparent.
The shear deflection of the upper PE substrates (top) and the resulting shear strain energies (bottom) during perpendicular and parallel sliding.
Comparisons of the lateral and normal forces and the friction coefficients during perpendicular and parallel sliding between the PE and PTFE systems.
Histogram of the number of bonds formed and broken during perpendicular and parallel sliding of the (a) PE and (b) PTFE systems.
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