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Friction and Wear Mechanisms of Sintered and Thermoplastic Polyimides under Adhesive Sliding
Author(s) -
Samyn Pieter,
Schoukens Gustaaf,
Verpoort Francis,
Van Craenenbroeck Jeroen,
De Baets Patrick
Publication year - 2007
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.200600400
Subject(s) - materials science , polyimide , thermoplastic , composite material , degradation (telecommunications) , polymer , adhesive , hydrolytic degradation , raman spectroscopy , layer (electronics) , computer science , telecommunications , physics , optics
Polyimides function under high‐temperature sliding. The available literature explains transitions in friction and wear mainly by mechanical effects, such as influences of normal load, sliding velocity and humidity on polymer transfer to steel counterfaces. Theoretical models are evaluated for sintered and thermoplastic polyimides. Tribologists have been interested in tribochemical and tribophysical reactions in the sliding interface for about 25 years. Reactions such as hydrolysis, imidisation and/or degradation occur as a function of sliding temperature and are reviewed in this paper. An overview of polyimide synthesis and degradation is presented, while new insights in sliding mechanisms are obtained from a detailed study of Raman spectroscopy on worn polymer surfaces.