Advertisement

Journal of Materials Science

, Volume 29, Issue 12, pp 3095–3101 | Cite as

Environmental stress cracking behaviour of urethane methacrylate based resins

Part I Environmental crazing and cracking under bending conditions
  • Jiajun Li
  • J. C. Arnold
  • D. H. Isaac
Article

Abstract

Two kinds of cross-linked urethane methacrylate resins have been investigated using three-point bend tests to determine their environmental stress cracking (ESC) behaviour in a range of liquids (water, sodium hydroxide, ethylene glycol, acetonitrile, acetic acid, acetone, tetrahydrofuran, toluene, 3,5,5-trimethylhexanol and petrol). The resins were found to undergo ESC in organic liquids only, and the critical strains, ɛc, and critical stresses, σc, have been related to the solubility parameters, δ, of the liquid environments. The most severe ESC was observed in solvents with δ−19–20 MPa1/2, corresponding to minimum points in the plots of ɛc and σc against δ. Generally, the resin with the higher cross-link density had a greater resistance to ESC, but the effect of liquid diffusion complicated the situation and was found to play an important role in the ESC behaviour of these materials. The results confirmed that liquid diffusion into the resins lowered the critical strain (and stress), leading to earlier failure. In the case of the lower cross-link density resin, very fast diffusion was found to cause softening. However, it was noted that liquid diffusion can also blunt crazes and cracks.

Keywords

Petrol Sodium Hydroxide Critical Strain Solubility Parameter Organic Liquid 
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.

References

  1. 1.
    E. J. Kramer, in “Developments in Polymer Fracture”, edited by E. H. Andrews (Applied Science, London, 1979) p. 55.Google Scholar
  2. 2.
    R. J. Young, “Introduction to Polymers” (Chapman and Hall, London, 1983) p. 314.Google Scholar
  3. 3.
    G. A. Bernier and R. P. Kambour, Macromolecules 1 (1968) 393.CrossRefGoogle Scholar
  4. 4.
    P. I. Vincent and S. Raha, Polymer 13 (1972) 283.CrossRefGoogle Scholar
  5. 5.
    A. J. Kinloch and R. J. Young, “Fracture Behaviour of Polymers” (Applied Science, London, 1983).Google Scholar
  6. 6.
    M. L. Orton, I. M. Fraser and S. H. Rogers, Eng. Plast. 1 (1988) 274.Google Scholar
  7. 7.
    M. L. Orton and D. J. Sparrow, Cell. Polym. 7 (1988) 309.Google Scholar
  8. 8.
    A. F. M. Barton, “CRC Handbook of Solubility Parameters and Other Cohesion Parameters” (CRC Press, Boca Raton, 1983).Google Scholar
  9. 9.
    S. Petrie, A. T. Dibenedetto and J. Miltz, J. Mater. Sci. 14 (1979) 246.CrossRefGoogle Scholar
  10. 10.
    J. Miltz, A. T. Dibenedetto and S. Petrie, ibid. 13 (1978) 2037.CrossRefGoogle Scholar
  11. 11.
    S. Yamini and R. J. Young, ibid. 14 (1979) 1609.CrossRefGoogle Scholar
  12. 12.
    R. P. Kambour and R. E. Robertson, in “Polymer Science”, edited by A. D. Jenkins (North-Holland, Amsterdam, 1972) p. 814.Google Scholar
  13. 13.
    P. J. Burchill, G. Mathys and R. H. Stacewicz, J. Mater. Sci. 22 (1987) 483.CrossRefGoogle Scholar

Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • Jiajun Li
    • 1
  • J. C. Arnold
    • 1
  • D. H. Isaac
    • 1
  1. 1.Department of Materials EngineeringUniversity of Wales SwanseaSwanseaUK

Personalised recommendations