Hostname: page-component-77c89778f8-9q27g Total loading time: 0 Render date: 2024-07-19T17:06:49.750Z Has data issue: false hasContentIssue false
  • English
  • Français

Structure and Dose Effects on Ion Beam Modification of Polymers

Published online by Cambridge University Press:  22 February 2011

G. R. Rao ,
E. H. Lee  and
L. K. Mansur
G. R. Rao
Affiliation:
Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831 On Assignment from Auburn University, Auburn, AL 36849.
E. H. Lee
Affiliation:
Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831
L. K. Mansur
Affiliation:
Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831
Get access

Abstract

Polyethylene (PE), polypropylene (PP), polystyrene (PS) and polyethersulfone (PES) were implanted with 200 keV boron ions at three different doses. PS was also implanted with 100 keV boron. A nanoindentation technique and reciprocating sliding wear tests were used to characterize mechanical properties of the implanted polymers. The results showed that hardness increased with increasing dose as well as increasing energy. The percentage increase in hardness was reduced with increasing complexity of the side groups although absolute hardness values were higher. With increasing complexity of the main backbone, polymer chain, the percentage increase in hardness as well as numerical hardness values were lower. These effects were attributed to the relative contributions of cross-linking and chain scission which were viewed as competing processes. Wear tests showed that in general, a lower or intermediate implant dose yielded the best improvement in wear resistance. No specific trends were observed for relating friction coefficient values and improved wear resistance. The results indicate that wear is a complex phenomenon which has a sensitive dependence on hardness and elastic properties of the mating surfaces.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 239: Symposium D – Thin Films: Stresses and Mechanical Properties III , 1991 , 189
Copyright
Copyright © Materials Research Society 1992

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Lee, E. H., Lewis, M. B., Blau, P. J. and Mansur, L. K., J. Mater. Res., 6(3) (1991) 610–628.Google Scholar
2. Reichmanis, Elsa, in The Effects of Radiation on High-Technology Polymers, edited by Reichmanis, Elsa and O'Donnell, J. H., ACS Symposium Series 381 (American Chemical Society, Washington D.C., 1989), p. 132.CrossRefGoogle Scholar
3. Venkatesan, T., Calcagno, L., Elman, B. S. and Foti, G., in Ion Beam Modification of Insulators. edited by Mazzoldi, P. and Arnold, G. W., (Elsevier Publishers, New York, 1987), pp. 301–379.Google Scholar
4. Fink, D., Muller, M., Chadderton, L. T., Cannington, P. H., Elliman, R. G. and McDonald, D. C., Nucl. Instrum. Meth. Phy. res., B32, 125–129 (1988).CrossRefGoogle Scholar
5. Lee, E. H., Rao, G. R. and Mansur, L. K., Submitted to J. Mater. Res.Google Scholar
6. Lewis, M. B., Allen, W. R., Buhl, R. A., Packán, N. H., Cook, S. W. and Mansur, L. K., Nucl. Instrum. and Methods in Physics Res., B43 243 (1989).Google Scholar
7. Oliver, W. C, MRS Bulletin, Sept/Oct 15 (1986).Google Scholar
8. Lee, E. H., Lee, Y-C., Oliver, W. C and Mansur, L. K., Submitted to J. Mater. Res.Google Scholar