Journal of Materials Science

, Volume 8, Issue 6, pp 863–870 | Cite as

Creep and recovery of polycarbonate

  • M. J. Mindel
  • N. Brown
Papers
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Accepted:

Abstract

The creep behaviour of polycarbonate was investigated at high stresses in tension and compression. The creep curve was separated into a recoverable strain and persistent strain. The equation describing the recoverable strain was directly related to the kinetics of the recovery curve. The concept of an internal stress was useful in describing the recoverable part of the creep and recovery.

The persistent strain-rate was related to the failure of the material by accelerated creep. Measurements of the temperature during creep showed that heating was not responsible for the occurrence of the material softening which lead to accelerated creep.

It was found that the strain behaviour during loading and unloading was asymmetrical in that the instantaneous loading strain was less than the instantaneous unloading strain.

Keywords

Polymer High Stress Polycarbonate Internal Stress Creep Behaviour 
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.
    O. D. Sherby andJ. E. Dorn,J. Mech. and Phys. Solids 6 (1956) 145.CrossRefGoogle Scholar
  2. 2.
    I. V. Yannas andA. C. Lunn,J. Macromol. Sci.-Phys. B4-(3) (1970) 603.Google Scholar
  3. 3.
    I. V. Yannas, N-H. Sung, andA. C. Lunn,ibid B5 (1971) 487.Google Scholar
  4. 4.
    I. V. Yannas andM. J. Doyle,J. Polymer Sci. A-2 10 (1972) 159.Google Scholar
  5. 5.
    C. Bauwens-Crowet, J-C. Bauwens, andG. Homes,ibid A-2,7 (1969) 735.Google Scholar
  6. 6.
    Idem J. Mater Sci. 7 (1972) 176.CrossRefGoogle Scholar
  7. 7.
    J-C. Bauwens,ibid 7 (1972) 577.CrossRefGoogle Scholar
  8. 8.
    D. J. Matz, W. G. Guldemond, andS. L. Cooper,J. Polymer Sci., Polym. Physics 10 (1972) 1917.CrossRefGoogle Scholar
  9. 9.
    M. M. Stratonova,Polymer Mechanics (Soviet) 3 (1972) 445, original,Mekhanika Polimerovs 3 (1967) 671.CrossRefGoogle Scholar
  10. 10.
    R. E. Robertson andA. M. Patel, G. E. Report No. 72CRD123 (1972).Google Scholar
  11. 11.
    M. Higuchi andY. Imai,J. Appl. Poly. Sci. 14 (1970) 2377.CrossRefGoogle Scholar
  12. 12.
    D. H. Ender andR. D. Andrews,J. Appl. Phys. 36 (1965) 3057.CrossRefGoogle Scholar
  13. 13.
    K. D. Mears, R. Pae, andJ. A. Sauer,J. Polymer Sci. B6 (1968) 773.Google Scholar
  14. 14.
    S. Rabinowitz andI. M. Ward,J. Mater. Sci. 5 (1970) 29.CrossRefGoogle Scholar
  15. 15.
    I. M. Ward,ibid 6 (1971) 1397.CrossRefGoogle Scholar
  16. 16.
    G. I. Gurevich, Tr.In-ta fiziki Zemli AN SSSR 2 (1959) 60.Google Scholar
  17. 17.
    A. S. Nowick andE. S. Machlin,J. Appl. Phys. 18 (1947) 79.CrossRefGoogle Scholar
  18. 18.
    H. Eyring,J. Chem. Phys. 4 (1936) 283.CrossRefGoogle Scholar

Copyright information

© Chapman and Hall Ltd 1973

Authors and Affiliations

  • M. J. Mindel
    • 1
  • N. Brown
    • 1
  1. 1.Department of Metallurgy and Materials Science and Laboratory for Research on the Structure of MatterUniversity of PennsylvaniaPhiladelphiaUSA

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