Table of Contents
ISRN Polymer Science
Volume 2013, Article ID 837952, 6 pages
http://dx.doi.org/10.1155/2013/837952
Research Article

Studies on Wear Properties of Polystyrene in the Presence of Fibrillated Network of Polytetrafluoroethylene

1Sabic Research & Technology (P) Ltd., Plot No. 81 to 85, Chikkadunnasandra Village, Anekal Taluk, Off Sarjapur-Attibele State Highway, Bangalore 562125, India
2Center for Polymer Science & Engineering, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi, India

Received 18 April 2013; Accepted 26 May 2013

Academic Editors: G. Gentile, A. Hashidzume, D. Pavel, and B. G. Soares

Copyright © 2013 Sumanda Bandyopadhyay 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.

Abstract

Polystyrene (PS) is an important commodity plastic; however, it is not known as a suitable material for tribological applications. It has a relatively high friction coefficient in contact with metallic surfaces and high abrasion loss factor. Polytetrafluoroethylene (PTFE) is a known friction modifier, has a low friction coefficient, and is extensively used to reduce the friction coefficient and wear rate (with engineering plastics to improve tribological properties). It is known for fluoroelastomers and engineering plastics that fine particles of PTFE have the greatest effect on improving the specified properties. Here, oriented, fibrillated network morphology of PTFE in PS matrix was prepared. The wear studies show a large reduction in both the friction coefficient (45% reduction) and the wear rate (2% incorporation of PTFE leads to a 49% reduction). But the friction coefficients do not show any significant change on increasing PTFE. A similar observation was made for the wear rate. Scanning electron microscope (SEM) images of the worn surfaces show a crack tip bridging mechanism, and it was observed that with the increase in PTFE content, the extent of crack tip bridging increases. This extensive improvement may be attributed to the unique morphology of the blend system.