Skip to main content Accessibility help
×
Home

Low-Energy AR+ Implantation of Uhmw-Pe Fibers: Effect on Surface Energy, Chemistry, and Adhesion Characteristics

  • R. Schalek (a1), M. Hlavacek (a1) and D. S. Grummon (a1)

Abstract

Ultra-high molecular weight polyethylene (UHMW-PE) has a highly chain-extended and crystalline structure which is functionally inert and requires surface-modification before it can successfully operate as a reinforcement in polymer-matrix composites. Although plasma treatments are adequate for this purpose, recent work has shown that irradiation with low-energy inert gas ions can produce increases in interfacial shear strength (ISS), in epoxy matrices, which exceed those of commercial plasma treatments, and cause little degradation in tensile properties. Low energy ions are readily produced in high-current beams using gridded sources having moderate cost, and processing times may be a short as a few seconds. In this paper, we present results of recent experiments using argon ions accelerated to energies between 100 eV and 1 keV to irradiate 20–30 μm diameter UHMW-PE fibers to doses between 1×1016 and 1×1017 cm−2, and compare our findings with previous work at higher accelerating potentials. At the optimum dose (which increases with decreasing energy), greater than 9-fold improvements in ISS level, measured in epoxy-resin droplet pulloff tests, were found for ion irradiation at 0.25 keV. Scanning electron microscopy of fiber surfaces, of ion irradiated as well as commercial oxygen plasma-treated materials, revealed small crack-like pits in both cases, with the pits smaller and more uniformly distributed on the ion-irradiated fibers. Surface chemistry studies using X-ray photoelec-tron spectroscopy (XPS) and attenuated total reflectance Fourier-transform infrared spectroscopy (ATR-FTIR) indicate that irradiation resulted in high surface concentrations of polar functional groups, and extensive surface oxidation. This was accompanied by a substantial increase in the polar component of surface energy, which resulted in improved fiber wetting by the resin.

Copyright

References

Hide All
1. Ozzello, A., Grummon, D. S., Drzal, L. T., Kalantar, J., Low, I-H. and Moody, R. A., MRS Proc. 153, 217222 (1989).
2. Gnunmon, D.S., Schalek, R., Ozzello, A. and Drzal, L.T. in Structural Composites: Design and Processing Technology, Pro. 6th Annual ASM/ESD Advanced Composites Conference, 155162, Oct. (1990).
3. Grummon, D.S.. Schalek, R., Ozzello, A., Kalantar, J. and Drzal, L.T., Nuc. Inst. and Meth., B59/60 12711275 (1991).
4. JCuomo, J., Rossnagel, S.M. and Kaufman, H.R. in Handbook of Ion Beam Processing Technology: Principles. Deposition- Film Modification and Synthesis, Park Ridge, N.J. (1989).
5. Nguyen, L.T.. Sung, N-H. and Suh, N.P., J. Polymer Sci.: Polym. Lett Ed. 18, 541548 (1980).
6. Kim, C. Y. and Goring, D.A.I., J. Applied Polymer Sci. 15, 13571361 (1971).
7. Gaur, U. and Davidson, T., MRS Proc. 170, 309314 (1990).
8. Venkatesan, T., Calcagno, L., Elman, B.S. and Foti, G. in Ion Beam Modifications Of Insulators, Eds. Mazzoldi, P. and Arnold, G.W., Elsevier, N.Y. (1987).
9. Koul, S.N., Campbell, I.D., McDonald, D.C., Chadderton, L.T., Fink, D., Biersack, J.P. and Mueller, M., Nuc. Inst. Meth., B32 186193 (1988).
10. Miller, B., Muri, P. and Rebenfeld, L., Compos. Sci. & Tech. 28, 1732 (1986).
11. Kaeble, D.H., Dynes, P.J. and Cirlin, E.H., J. Adhesion, 6, 2348 (1974).
12. Schalek, R. and Grummon, D.S. in Advanced Composite Materials: New Developments and Applications, Proc. Conf., 389395 (1991).
13. Nguyen, H. X.. Merrill, R. G., Schriver, A. K. and Leone, E. A. in Structural Composites: Design and Processing Technologies, Pro. 6th Annual ASM/ESD Advanced Composites Conference, 333343, Oct. (1990).
14. Schaible, M., Hayden, H. and Tanaka, J., IEEE Trans. Electr. Insul. EI- 22 699, (1987)
15. Gedde, U.W. and Ifwarson, M., Polym. Eng. Sci. 30, 202, (1990)

Low-Energy AR+ Implantation of Uhmw-Pe Fibers: Effect on Surface Energy, Chemistry, and Adhesion Characteristics

  • R. Schalek (a1), M. Hlavacek (a1) and D. S. Grummon (a1)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed