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International Journal of Polymer Science
Volume 2018, Article ID 2302407, 6 pages
Research Article

The Tribological and Sealing Properties of PFA Composites

1Guangzhou Mechanical Engineering Research Institute Co., Ltd., Guangzhou, Guangdong 510700, China
2Kingfa Sci. & Tech. Co., Ltd., Guangzhou, Guangdong 510670, China
3College of Materials Science and Engineering, South China University of Technology, Guangzhou, Guangdong 510640, China

Correspondence should be addressed to Ye Sujuan; moc.361@001naujusey

Received 21 November 2017; Accepted 26 April 2018; Published 16 May 2018

Academic Editor: De-Yi Wang

Copyright © 2018 Ye Sujuan et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The polytetrafluoroethylene (PTFE) and perfluoroalkoxyperfluoropropyl vinyl ether (PFA) composites were prepared using carbon fiber (CF) and glass fiber (GF) as fillers. The effects of these fillers on the tribological and sealing properties were investigated. The tribological and sealing properties of the composites were evaluated by a wear tester and a seal test rig. Results showed that the incorporation of CF and GF both improved the wear resistance with composites, approaching wear rates as low as 10−6 mm3/N·m and lowered the seal’s leakage of the PTFE/PFA composites. As described here, CF was more effective than GF in improving the wear rate. Notably, the wear rate of the PFA/CF composite is much less than that of the PTFE composites as the transfer film on the couple ring is much more unique, thick, smooth, and compact. The leakage of carbon fiber-filled PFA composite seal was lowered to 66% less than the traditional PTFE composite seals, which indicates better sealing properties.