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A prediction of polymer wear using polymer mechanical properties and surface characterization parameters.
Polymers were slid on rough hard steel surfaces with normal loads
which caused full penetration (real and apparent areas equal) and
partial penetration (real less than apparent area). Wear data for
polyvinylchloride (PVC) and polychlorotrifluoroethylene (PCTFE) was
obtained on a pin-on-disk machine using neutron activation analysis
A (NAA). Observations of the wear process were made in the scanning
electron microscope (SEM) both before, during, and after the wear
experiment. It was observed that these polymers along with Nylon 6-6
tend to wear in discrete sites rather than continuous films. At these
discrete sites the polymer shears at an angle which is dependent on
the mechanical properties of the polymer and on the asperity angle.
There appears to be a minimum shear angle beyond which no wear occurs.