Journal of Materials Science

, Volume 29, Issue 12, pp 3151–3160 | Cite as

Effects of distortional components in biaxial stretching of poly (ethylene terephthalate) sheets on dimensional stability and structure

  • L. Mascia
  • Z. Fekkai
  • G. Guerra
  • L. Parravicini
  • F. Auriemma


Thin sheets of poly (ethylene terephthalate) were stretched biaxially over a wide range to temperatures below the melting point of the polymer. The linear shrinkage occurring at temperatures between 85 and 100 °C decreased with increasing draw temperature and draw ratio. Specimens taken near the edges of the drawn sheets, which had been subjected to in-plane shear deformations, were found to exhibit linear shrinkage 5–8 times lower than those taken from the middle of the sheet. Subsequent experiments, using purpose-built clamps to achieve a more uniform state of shear in both directions of the biaxially drawn samples, confirmed the universality of the principle of shrinkage suppression by the superposition of shear deformations. X-ray diffraction studies revealed that the phenomenon was not related to differences in type of orientation of the crystals. The information from the X-ray diffraction studies and data from thermal analysis have led to the conclusion that the enhanced dimensional stability of biaxially drawn sheets subjected to superimposed shear deformations results from a combination of a higher rate of stress-induced crystallization and a reduction in the level of orientation within the amorphous phase.


Crystallization Shrinkage Thermal Analysis Amorphous Phase Shear Deformation 
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  1. 1.
    “Kodapak PET, Thermoplastic Polyester” (Eastman Chemical Products Inc., Kingsport, USA, 1982).Google Scholar
  2. 2.
    W. L. Corsoever, Netherlands Patent 7 203 971 (1972); US Patents 3 803 275 (1974) and 3 745 150 (1973).Google Scholar
  3. 3.
    H. G. Fritz, Kunstoffe 68 (1978) 450.Google Scholar
  4. 4.
    N. C. Wyeth and R. N. Roseveorve, US Patent 3 733 309 (1973).Google Scholar
  5. 5.
    N. H. Ladizesky and I. M. Ward, J. Mater. Sci. 8 (1973) 980.CrossRefGoogle Scholar
  6. 6.
    F. le Bourvellec, L. Monnerie and J. P. Jarry, Polymer 28 (1987) 1712.CrossRefGoogle Scholar
  7. 7.
    A. J. de Vries, C. Bonnebat and J. Beautemps, J. Polym. Sci., Polym. Symp. 58 (1977) 109.CrossRefGoogle Scholar
  8. 8.
    M. Cakmak, J. L. White and J. E. Spruiell, in Proceedings of ANTEC 85, 43rd Annual Technical Conference of the Society of Plastics Engineers, Washington DC, April 1985, p. 912.Google Scholar
  9. 9.
    W. J. Hennessey and A. L. Spatarico, Polym. Eng. Sci. 19 (1979) 462.CrossRefGoogle Scholar
  10. 10.
    P. Monaresi, P. Parrini, G. L. Semeghini and E. Defornassari, Polymer 17 (1976) 595.CrossRefGoogle Scholar
  11. 11.
    G. S. Y. Yeh and P. H. Geill, J. Macromol Sci. B1 (1967) 251.CrossRefGoogle Scholar
  12. 12.
    Idem, ibid. B1 (1967) 251.CrossRefGoogle Scholar
  13. 13.
    G. A. J. Orchard, P. Spiby and I. M. Ward, J. Polym. Sci., Polym. Phys. 28 (1990) 603.CrossRefGoogle Scholar
  14. 14.
    L. J. Fina, D. I. Bower and I. M. Ward, Polymer 29 (1988) 2146.CrossRefGoogle Scholar
  15. 15.
    D. A. Jarvis, I. J. Hutchinson, D. I. Bower and I. M. Ward, ibid. 21 (1980) 41.CrossRefGoogle Scholar
  16. 16.
    L. Mascia and Z. Fekkai, ibid. 37 (1993) 1419.Google Scholar
  17. 17.
    W. N. Kim and C. M. Burns, J. Appl. Polym. Sci. 32 (1986) 2989.CrossRefGoogle Scholar
  18. 18.
    Idem, ibid. 34 (1987) 945.CrossRefGoogle Scholar
  19. 19.
    Idem Macromolecules 20 (1987) 1876.CrossRefGoogle Scholar
  20. 20.
    J. H. Nobbs, D. I. Bower and I. M. Ward, Polymer 17 (1976) 25.CrossRefGoogle Scholar
  21. 21.
    G. Hinrichsen, H. G. Adam, H. Krebs and H. Springer, Coll. Polym. Sci. 285 (1980) 232.CrossRefGoogle Scholar
  22. 22.
    V. Busico, P. Corradini, F. Riva, A. Seves and L. Vicini, Makromol. Chem. Rapid Commun. 1 (1980) 423.CrossRefGoogle Scholar
  23. 23.
    T. Sun, J. Pereira and R. S. Porter, J. Polym. Sci., Polym., Phys., Edn 22 (1984) 1163.CrossRefGoogle Scholar
  24. 24.
    H. Springer, U. Brinkmann and G. Hinrichsen, Coll. Polym. Sci. 259 (1981) 38.CrossRefGoogle Scholar
  25. 25.
    M. J. Napolitano and A. Moet, J. Appl. Polym. Sci. 34 (1987) 1285.CrossRefGoogle Scholar
  26. 26.
    L. Parravicini, B. Leone, F. Auriemma, G. Guerra, V. Petraccone, G. Di Dino, R. Bianchi, R. Vosa, J. Appl. Polym. Sci. in press.Google Scholar
  27. 27.
    W. O. Stratton and G. M. Godard, J. Appl. Phys. 28 (1957) 1111.CrossRefGoogle Scholar
  28. 28.
    R. P. Daubeny, C. W. Bunn and C. Brown, Proc. R. Soc. A226 (1954) 531.Google Scholar
  29. 29.
    I. H. Hall, in “Structure of Crystalline Polymers”, edited by I. H. Hall (Elsevier Applied Science, London, 1984) p. 39.Google Scholar
  30. 30.
    C. J. Heffelfinger and R. Burton, J. Polym. Sci. 47 (1960) 289.CrossRefGoogle Scholar
  31. 31.
    E. Wener, S. Janoka, J. Hopper and K. J. MacKenzie, in “Encyclopedia of Polymer Science and Engineering”, (Wiley Interscience) Vol. 12, p. 13.Google Scholar
  32. 32.
    P. Chandran and S. Jabarin, Adv. Polym. Technol. 12 (1993) 119.CrossRefGoogle Scholar
  33. 33.
    M. Kakudo and N. Kasai, “X-Ray Diffraction by Polymers” (Kodansha, Tokyo, 1972) Ch. 10.Google Scholar
  34. 34.
    H. Tadokoro, “Structure of Crystalline Polymers” (Wiley, New York, 1979) p. 68.Google Scholar
  35. 35.
    M. Casey, Polymer 18 (1977) 1219.CrossRefGoogle Scholar
  36. 36.
    T. Asano and T. Seto, Polym. J. 5 (1973) 72.CrossRefGoogle Scholar
  37. 37.
    Z. Fekkai, PhD thesis, Loughborough University of Technology (1991).Google Scholar
  38. 38.
    M. Cakmak, J. L. White, J. S. Lin and J. E. Spruiell, in Proceedings of ANTEC 85, 43rd Annual Technical Conference of the Society of Plastics Engineers, Washington DC, April 1985, p. 728.Google Scholar

Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • L. Mascia
    • 1
  • Z. Fekkai
    • 1
  • G. Guerra
    • 2
  • L. Parravicini
    • 2
  • F. Auriemma
    • 2
  1. 1.Institute of Polymer Technology and Materials EngineeringLoughborough University of TechnologyLoughboroughUK
  2. 2.Dipartimento di ChimicaUniversita' di Napoli - Federico IINaplesItaly

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