Abstract
AbstractPure and internal PTFE‐lubricated polyesters are slid against steel and stainless steel on large‐scale and small‐scale tribological test rigs under normal loads between 8 and 150 MPa and temperatures of 80–200 °C. The polymer sliding surfaces are analysed by Raman spectra according to a two‐phase system of trans (oriented) and gauche (non‐oriented) structures. Comparing the spectra of pure and internal lubricated polyesters reveals a clear band at 713 cm−1 correlated to PTFE depositions. For small‐scale tests, the crystalline content and overall orientation is larger (40–50%) while no significant increase in the PTFE‐related band is observed. A PTFE/polyester film is transferred onto the steel counterface without back‐transfer to the polymer surface. Large‐scale polymer surfaces have a lower orientation (30–40%) and contradictory to small‐scale samples, PTFE lubricants are observed on the polymer surface. The formation of a PTFE film on the polyester sliding surface is then favourable for low friction and stabilization in wear rates. Orientation and wear effects depend on the movability of wear debris and plastification of the surface, illustrated by Raman spectroscopy. Copyright © 2006 John Wiley & Sons, Ltd.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
