Journal of Materials Science

, Volume 22, Issue 4, pp 1405–1412 | Cite as

Tensile behaviour of multilayer thermoplastic composites

  • A. Siegmann
  • M. Ben-Tzur
Papers
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Accepted:

Abstract

Multilayer thermoplastic composite sheets consisting of alternating layers of two materials mainly differing in their ductility were laminated. The mechanical behaviour, irreversible deformation mechanism and fracture of two systems made up of (I) polystyrene (PS)/Noryl and (II) rigid PVC/PVC-EVA blend were studied. In System I the tensile properties change with composition up to 40 to 60 vol % PS while at higher PS content the latter dictates the behaviour of the system. Upon stretching, crazes and cracks were formed in the PS layer. Their propagation was retarded by the Noryl Layers. Subsequently the PS was deformed to rather high strains, otherwise not attainable, and shear bands, which were initiated at the crack tips, developed in the Noryl layers. The interaction between cracks and shear zones resulted in delocalized deformation and fracture delay. In System II the low strain properties linearly change with composition, identical to the behaviour of blends of similar compositions. However the ultimate elongation of three layers sheets and PVC/EVA blends attain maximum values which are higher than those of the components themselves, while that of five layer sheets changes gradually with composition. The good interlayer adhesion in all the systems studied enables cooperative irreversible deformation processes reflected by the mechanical behaviour and the fracture surface morphology of the composite sheets.

Keywords

Ductility Shear Zone Shear Band Tensile Behaviour Irreversible Deformation 
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.
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References

  1. 1.
    W. J. Schrenk andT. Alfrey Jr., in “Polymer Blends”, Vol. 2, edited by F. R. Paul and S. Newman, (Academic Press, New York, 1978) p. 129.Google Scholar
  2. 2.
    T. Alfrey Jr. andW. J. Schrenk,Science 208 (1980) 813.Google Scholar
  3. 3.
    W. J. Schrenk andT. Alfrey Jr.,Society of Plastics Eng. 29 (1973) 38.Google Scholar
  4. 4.
    W. J. Schrenk,Plast. Eng. 30 (1974) 65.Google Scholar
  5. 5.
    P. M. Scop andA. S. Argon,J. Compas. Mater. 1 (1967) 92.Google Scholar
  6. 6.
    W. J. Schrenk andT. Alfrey Jr.,Polym. Eng. Sci. 9 (1969) 393.Google Scholar
  7. 7.
    S. K. Bhateja andT. Alfrey Jr.,J. Compos Mater. 14 (1980) 42.Google Scholar
  8. 8.
    L. K. Djiauw andD. G. Fesko,Rubber Chem. Technol. 49 (1976) 49.Google Scholar
  9. 9.
    A. Hiltner, B. L. Gregory, E. Baer andJ. Im,Polym. Eng. Sci. (in press).Google Scholar
  10. 10.
    B. L. Gregory, A. Siegmann, J. Im, A. Hiltner andE. Baer,J. Mater. Sci. (in press).Google Scholar
  11. 11.
    L. E. Nielsen, “Mechanical Properties of Polymers and Composites” (Plenum, New York, 1971) p. 398.Google Scholar
  12. 12.
    P. Beaham, M. Bevis andD. Hull,Proc. Soc. A343 (1975) 525.Google Scholar
  13. 13.
    B. D. Lauterwasser andE. J. Kramer,Phil. Mag. A39 (1979) 469.Google Scholar
  14. 14.
    J. Murray andD. Hull,Polymer 10 (1969) 451.Google Scholar
  15. 15.
    L. Engel, H. Klingele, G. W. Ehrenstein andH. Schaper, “An Atlas of Polymer Damage” (Wolfe, Munich 1981) p. 146.Google Scholar
  16. 16.
    H. H. Kausch, J. A. Hanssell andR. J. Jaffee, “Deformation and Fracture of High Polymers” (Plenum, New York, 1972), p. 271.Google Scholar
  17. 17.
    A. J. Kinloch andR. J. Younk, “Fracture Behavior of Polymers” (Applied Science, New York, 1983) p. 107.Google Scholar
  18. 18.
    N. J. Mills,Eng. Fract. Mech. 6 (1974) 537.Google Scholar
  19. 19.
    H. F. Brinson,Expl. Mech. 27 (1970) 72.Google Scholar
  20. 20.
    A. M. Donald andE. J. Kramer,Polymer 23 (1982) 1183.Google Scholar
  21. 21.
    Idem, J. Polym. Sci. Polym. Phys. Ed. 20 (1982) 899.Google Scholar
  22. 22.
    Idem, J. Mater. Sci. 17 (1982) 1765.Google Scholar
  23. 23.
    A. Siegmann andA. Hadas,J. Appl. Polym. Sci. (in press).Google Scholar
  24. 24.
    A. Siegmann, L. K. English, E. Baer andA. Hiltner,Polym. Eng. Sci. 24 (1984) 877.Google Scholar

Copyright information

© Chapman and Hall Ltd 1987

Authors and Affiliations

  • A. Siegmann
    • 1
  • M. Ben-Tzur
    • 1
  1. 1.Department of Materials Engineering, TechnionIsrael Institute of TechnologyHaifaIsrael

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