Hostname: page-component-78c5997874-g7gxr Total loading time: 0 Render date: 2024-11-17T20:16:45.026Z Has data issue: false hasContentIssue false
  • English
  • Français

Friction and Scratch Resistance of Polymer Liquid Crystals: Effects of Magnetic Field Orientation

Published online by Cambridge University Press:  03 March 2011

Witold Brostow  and
Magdalena Jaklewicz
Witold Brostow*
Affiliation:
Laboratory of Advanced Polymers & Optimized Materials (LAPOM), Department of Materials Science and Engineering, College of Engineering, University of North Texas, Denton, Texas 76203-5310
Magdalena Jaklewicz
Affiliation:
Department of Mechanical Engineering, McGill University, Montreal, Quebec, Canada H3A 2K6
*
a)Address all correspondence to this author. e-mail: [email protected]
Get access

Abstract

We have studied PET/0.6 PHB, an alternating copolymer in which PET is poly(ethylene terephthalate) and PHB is p-hydroxybenzoic acid with the mole fraction of 0.6 PHB. It is a longitudinal polymer liquid crystal (PLC) with the LC sequences in the main chain and oriented along the chain backbone. Material not subjected to the magnetic field, specimens oriented along and perpendicularly to the flux of the magnetic field, were investigated. Static friction, dynamic friction, scratch penetration depth, and healing of the material were determined. Static and dynamic friction parameters for oriented samples have significant higher values for oriented samples. The best scratch resistance is found for the sample aligned along the magnetic field. The results are explained in terms of morphology revealed by scanning electron microscopy and phase structures.

Keywords

Molecular compositePolymer liquid crystalPolymer tribology
Type
Articles
Information
Journal of Materials Research , Volume 19 , Issue 4 , April 2004 , pp. 1038 - 1042
Copyright
Copyright © Materials Research Society 2004

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 Physical Properties of Polymers Handbook, edited by Mark, J.E. (American Institute of Physics Press, Woodbury, NY, 1996)Google Scholar
2Goldman, A.Y.: Prediction of Deformation Properties of Polymeric Composite Materials (American Chemical Society, Washington, DC, 1994)Google Scholar
3Rabinowicz, E.: Friction and Wear of Materials (Wiley, New York, 1995)Google Scholar
4Zhang, S.W.: Tribol. Int. 31, 49 (1998).CrossRefGoogle Scholar
5Brostow, W., Deborde, J-L., Jaklewicz, M. and Olszynski, P.: J. Mater. Ed . 25,(2003, in press)Google Scholar
6 Friction and Wear Technology for Advanced Composite Materials, edited by Rohatgi, P.K. (ASM International, Materials Park, OH, 1994)Google Scholar
7Matériaux et contacts: une approche tribologique, edited by Zambelli, G. and Vincent, L. (Presses Polytechniques Universitaires Romandes, Lausanne, 1998).Google Scholar
8Brostow, W., Cassidy, P.E, Hagg, H.E., Jaklewicz, M. and Montemartini, P.E.: Polym. 42, 7971 (2001).CrossRefGoogle Scholar
9Brostow, W., Bujard, B., Cassidy, P.E., Hagg, H.E. and Montemartini, P.E.: Mater. Res. Innovat. 6, 7 (2002).CrossRefGoogle Scholar
10Brostow, W.: Polym. 31, 979 (1990).CrossRefGoogle Scholar
11 Mechanical and Thermophysical Properties of Polymer Liquid Crystals, edited by Brostow, W. (Chapman & Hall, London, U.K., 1998)Google Scholar
12Brostow, W., Faitelson, E.A., Kamensky, M.G., Korkhov, V.P. and Rodin, Y.P.: Polym. 40, 1441 (1999).CrossRefGoogle Scholar
13Brostow, W., Jaklewicz, M., Mehta, S. and Montemartini, P.E.: Mater. Res. Innovat. 5, 261 (2002).CrossRefGoogle Scholar
14 Tribology and the Liquid-Crystalline State, edited by Biresaw, G. (American Chemical Society, Washington, DC, 1990)Google Scholar
15Harsha, A.P. and Tewari, U.S.: Polymer Testing. 21, 697 (2002).CrossRefGoogle Scholar
16Voss, H. and Friedrich, K.: Tribol. Int. 10, 145 (1986).CrossRefGoogle Scholar
17Brostow, W. in Physical Properties of Polymers Handbook, edited by Mark, J.E. (American Institute of Physics Press, Woodbury, NY, 1996), Ch. 33Google Scholar
18Brostow, W., Hess, M. and Lopez, B.L.: Macromolecules. 21, 2262 (1994).CrossRefGoogle Scholar
19Brostow, W., Lopez, B.L and Sterzynski, T.: Polym. 37, 1551 (1996).CrossRefGoogle Scholar
20Brostow, W., Bujard, B., Cassidy, P.E. and Venumbaka, S.: Polym. Int. 52, 1498 (2003).CrossRefGoogle Scholar
21Brostow, W., Sterzynski, T. and Triouleyre, S.: Polym. 37, 1561 (1996).CrossRefGoogle Scholar
22Brostow, W., D’Souza, N.A., Kubat, J. and Maksimov, R.: J. Chem. Phys. 110, 9706 (1999).CrossRefGoogle Scholar
23 ASTM D 1894–90, American Society for Testing and Materials, West Conshohocken, PA.Google Scholar
24Hess, M. and Lopez, B.L. in Mechanical and Thermophysical Properties of Polymer Liquid Crystals , edited by Brostow, W. (Chapman & Hall, London, U.K., 1998)Google Scholar
25Brostow, W., III, M. Donahue, Karashin, C.E. and Simoes, R.: Mater. Res. Innovat. 4, 75 (2001).CrossRefGoogle Scholar
26Brostow, W., Cuhna, A.M., Quintanilla, J. and Simoes, R.: Macromol. Theory Simul. 11, 308 (2002).3.0.CO;2-Z>CrossRefGoogle Scholar
27Brostow, W., Cunha, A.M. and Simoes, R.: Mater. Res. Innovat. 7, 19 (2003).CrossRefGoogle Scholar
28Gupta, A.K. and Lloyd, S.A.: J. Mater. Sci. Eng. 301, 140 (2001).CrossRefGoogle Scholar
29Sun, W.S. and Quan, M.X.: Mater. Lett. 27, 101 (1996).CrossRefGoogle Scholar
30Behr, R., Mayer, J. and Arzt, E.: Scr. Mater. 36, 341 (1997).CrossRefGoogle Scholar
31Lu, L., Lai, M.O. and Hoe, M.L.: Nanostructured Mater. 10, 551 (1998).CrossRefGoogle Scholar
32Arzt, E., Dehm, G., Gumbsch, P., Kraft, O. and Weiss, D.: Prog. Mater. Sci. 46, 283 (2001).CrossRefGoogle Scholar
33Yang, S., Gokhale, A.M. and Shan, Z.: Acta Mater. 48, 2307 (2000).CrossRefGoogle Scholar
34Verelst, M., Bonino, J.P. and Rousset, A.: Mater. Sci. Eng. A. 135, 51 (1991).CrossRefGoogle Scholar
35Caceres, C.H. and Griffith, J.R.: Acta Mater. 44, 25 (1996).CrossRefGoogle Scholar
36Parthasarathy, T.A., Mendiratta, M.G. and Dimiduk, D.M.: Scr. Mater. 37, 315 (1997).CrossRefGoogle Scholar
37von Stebut, J., Lapostolle, F., Busca, M. and Vallen, H.: Surf. Coat. Technol. 160, 116 (1999).Google Scholar
38Michler, G.H.: Kunststoff–Mikromechanik: Morphologie, Deformations–und Bruchmechanismen (Hanser, München–Wien, 1992)Google Scholar
39 Handbook of Polymer Testing , edited by Brown, R. (Marcel Dekker, New York–Basel, 1999)Google Scholar
40Garbassi, F. and Occhiello, E. in Performance of Plastics , edited by Brostow, W. (Hanser, Cincinnati, OH, 2000), Ch. 16Google Scholar
41Deng, M. and Shalaby, S.W. in Performance of Plastics , edited by Brostow, W. (Hanser, Cincinnati, OH, 2000), Ch. 23.Google Scholar