Advertisement

Journal of Materials Science

, Volume 29, Issue 9, pp 2481–2486 | Cite as

Toughened-hybrid epoxies: influence of the rubber-phase morphology on mechanical properties

  • C. I. Vallo
  • Lijiang Hu
  • P. M. Frontini
  • R. J. J. Williams
Papers

Abstract

A toughened-epoxy polymer based on diglycidylether of bisphenol A (DGEBA) cured with ethylenediamine (EDA) and modified with a rubber based on an epoxy-terminated acrylonitrile-butadiene random copolymer (ETBN), exhibited different morphologies depending on the rubber content. Up to 10% rubber, the morphology consisted of a random dispersion of spherical domains rich in rubber, while at 15% rubber, large and irregular domains were present, turning into a co-continuous structure at 20% rubber. Mechanical properties (elastic modulus, uniaxial compression yield stress, critical stress intensity factor, KIC and strain energy release rate, GIC) of the toughened epoxies and hybrid-particulate materials containing glass beads, were analysed. The best mechanical properties were exhibited by hybrids with a random dispersion of rubbery domains in the epoxy matrix. The presence of large and irregular domains or co-continuous structures led to materials with poor mechanical properties.

Keywords

Epoxy Rubber Stress Intensity Factor Energy Release Rate Uniaxial Compression 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Reference

  1. 1.
    D. Verchere, J. P. Pascault, H. Sautereau, S. M. Moschiar, C. C. Riccardi and R. J. J. Williams, J. Appl. Polym. Sci. 43 (1991) 293.Google Scholar
  2. 2.
    K. C. Radford, J. Mater. Sci. 6 (1971) 1286.Google Scholar
  3. 3.
    R, J. Young and P. W. R. Beaumont, ibid. 12 (1977) 684.Google Scholar
  4. 4.
    A. C. Moloney, H. H. Kausch and H. R. Stieger, ibid., 18 (1983) 208.Google Scholar
  5. 5.
    Idem, ibid. 19 (1984) 1125.Google Scholar
  6. 6.
    J. Spanoudakis and R. J. Young, ibid. 19 (1984) 473.Google Scholar
  7. 7.
    Idem, ibid. 19 (1984) 487.CrossRefGoogle Scholar
  8. 8.
    D. L. Maxwell, R. J. Young and A. J. Kinloch, J. Mater. Sci. Lett. 3 (1984) 9.Google Scholar
  9. 9.
    A. J. Kinloch, D. L. Maxwell and R. J. Young, ibid. 4 (1985) 1276.Google Scholar
  10. 10.
    Idem, J. Mater. Sci. 20 (1985) 4169.Google Scholar
  11. 11.
    R. J. Young, D. L. Maxwell and A. J. Kinloch, ibid. 21 (1986) 380.Google Scholar
  12. 12.
    A. C. Moloney, H. H. Kausch, T. Kaiser and H. R. Beer, ibid. 22 (1987) 381.Google Scholar
  13. 13.
    A. C. Roulin-Moloney, W. J. Cantwell and H. H. Kausch, Polym. Compos. 8 (1987) 314.Google Scholar
  14. 14.
    S. Bandyopadhyay, V. M. Silva, I. M. Low and Y. W. Mai, Plast. Rubb. Proc. Appl. 10 (1988) 193.Google Scholar
  15. 15.
    A. Maazouz, H. Sautereau and J. F. Gerard, J. Appl. Polym. Sci. 50 (1993) 615.Google Scholar
  16. 16.
    D. Verchere, H. Sautereau, J. P. Pascault, S. M. Moschiar, C. C. Riccardi, R. J. J. Williams, Polymer 30 (1989) 107.Google Scholar
  17. 17.
    C. C. Riccardi, H. E. Adabbo and R. J. J. Williams, J. Appl. Polym. Sci. 29 (1984) 2481.Google Scholar
  18. 18.
    S. Yamini and R. J. Young, J. Mater. Sci. 15 (1980) 1814.Google Scholar
  19. 19.
    Idem, ibid. 14 (1979) 1609.Google Scholar
  20. 20.
    N. Amdouni, H. Sautereau, J. F. Gerard, F. Fernagut, G. Coulon and J. M. Lefebvre, ibid. 25 (1990) 1435.Google Scholar
  21. 21.
    D. Verchere, H. Sautereau, J. P. Pascault, S. M. Moschiar, C. C. Riccardi and R. J. J. Williams, in “Toughened Plastics I, Science and Engineering”, Advances in Chemistry Series, Vol. 233, edited by C. K. Riew and A. J. Kinloch (American Chemical Society, Washington DC, 1993) p. 335.Google Scholar
  22. 22.
    O. Ishai and L. J. Cohen, Int. J. Mech. Sci. 9 (1967) 539.Google Scholar
  23. 23.
    A. J. Kinloch and J. G. Williams, J. Mater. Sci. 15 (1980) 987.Google Scholar

Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • C. I. Vallo
    • 1
  • Lijiang Hu
    • 1
  • P. M. Frontini
    • 1
  • R. J. J. Williams
    • 1
  1. 1.Institute of Materials Science and Technology (INTEMA)University of Mar del Plata and National Research Council (CONICET)Mar del PlataArgentina

Personalised recommendations