Present study investigates changes in the conformation of functional groups at the polymer sliding surface by postmortem Raman spectroscopy, thermomechanical analysis and SEM/EDX. Two case studies on sintered polyimide (SP) and thermoplastic polyethylene-terephtalate (PET) are presented, indicating the influences of sliding temperature, counterface type and internal lubricants (PET/PTFE) on some characteristic absorption bands in the Raman spectrum of the sliding surfaces.

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