Journal of Materials Science

, Volume 24, Issue 8, pp 2775–2780 | Cite as

Antiplasticization of polyvinyl chloride in relation to crazing and fracture behaviour

  • L. Mascia
  • P. G. Wooldridge
  • M. J. Stokell
Papers

Abstract

Experiments were carried out to study the effects of small amounts (10 p.h.r.) of tricresylphosphate in polyvinylchloride on the crazing behaviour and fracture toughness over a wide range of temperatures. Crazing was induced by water/methanol mixtures and the critical crazing strain was measured as a function of immersion time and methanol concentration. Fracture toughness was measured on single-edge notched specimens in tension over three decades of strain rate in the temperature range −80 to 60°C. The 60 sec isochronous critical crazing strain displayed a minimum at around room temperature in an approximately parabolic fashion; the plasticized polymer exhibiting lower trough values, while the two curves intersected at both low and high temperatures. The fracture toughness curves, on the other hand, exhibited intermediate peaks, associated with β relaxations. The addition of plasticizers to the polymer reduced considerably the heights of the peaks and, once more, the two curves intersected at high temperature and merged at low temperature. From a comparison of the two sets of data, it is suggested that embrittlement due to antiplasticization is associated with a reduction in stability of the crazes as a result of the depression of β relaxations.

Keywords

Polymer Chloride Methanol Depression Fracture Toughness 

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References

  1. 1.
    V. JACOBSON,Br. Plast. 32 (1959) 152.Google Scholar
  2. 2.
    N. J. JACKSON and J. R. CALDWELL,Adv. Chem. Ser. 48 (1965) 185.Google Scholar
  3. 3.
    G. PEZZIN, G. AJROLDI and C. CARBUGLIO,J. Appl. Polym. Sci. 11 (1967) 2553.Google Scholar
  4. 4.
    L. M. ROBESON,Polym Engng Sci. 9 (1969) 280.CrossRefGoogle Scholar
  5. 5.
    N. KINJO and T. NAKAGAWA,Polym. J. 4 (1973) 29.Google Scholar
  6. 6.
    V. G. KHOZIN, A. G. FARAKLOV and V. A. VOKSENSKII,Polym. Sci. USSR 21 (1980) 1948.Google Scholar
  7. 7.
    L. MASCIA and G. MARGETTS, Third International Conference, PVC ’87, 28–30 April 1987, Brighton, UK (PRI) pp. 4.1–4.13.Google Scholar
  8. 8.
    M. G. WYZGOSKI and G. S. YEH,Polym. J. 4 (1973) 29.Google Scholar
  9. 9.
    L. MASCIA and G. MARGETTS,J. Macromol. Sci. Phys. B26 (2) (1987) 237.Google Scholar
  10. 10.
    L. MASCIA,Polymer 91 (1978) 325.Google Scholar
  11. 11.
    L. MASCIA,Polym. Test. 7 (1987) 109.CrossRefGoogle Scholar
  12. 12.
    H. R. BROWN and G. STEVENS,J. Mater. Sci. 13 (1978) 2373.CrossRefGoogle Scholar
  13. 13.
    M. SKIBO, J. A. MANSON and R. W. HERTZBERG,J. Macromol. Sci. Phys. B14 (4) (1977) 525.Google Scholar
  14. 14.
    K. SUZUKI, S. YADA, N. MABUCHI, K. SEINCHI and Y. MATSUTANI,Kobunshi Kagaku 28 (1971) 920.Google Scholar
  15. 15.
    G. E. DIETER, “Mechanical Metallurgy”, 2nd Edn (McGraw-Hill, Tokyo, 1976), p. 681.Google Scholar
  16. 16.
    B. GROSS and J. E. STRAWLEY, TND-3092, NASA, December 1965.Google Scholar
  17. 17.
    E. PLATI and J. G. WILLIAMS,Polymer 16 (1975) 915.CrossRefGoogle Scholar

Copyright information

© Chapman and Hall Ltd. 1989

Authors and Affiliations

  • L. Mascia
    • 1
  • P. G. Wooldridge
    • 1
  • M. J. Stokell
    • 1
  1. 1.Loughborough University of TechnologyLeicestershireLoughboroughUK

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