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Journal of Materials Science

, Volume 42, Issue 18, pp 7850–7860 | Cite as

Sensitivity of damage to microstructure evolution occurring during long-term high-temperature annealing in a semi-crystalline polymer

  • Sylvie CastagnetEmail author
  • David Girard
Article

Abstract

This study aimed to highlight the role of microstructure evolutions induced by high temperature annealing on damage in a semi-crystalline polymer during long-term applications. It was based on a polar form of poly(vinylidene fluoride) (Tg = −40 °C; Tm = 170 °C) and the long term annealing context dealt with burst resistance tests performed for 1000 h in a temperature range from 95 °C up to 140  °C. A secondary crystallization was observed after annealing by Differential Scanning Calorimetry and a consistent phenomenology was evidenced in Dynamic Mechanical Analysis. A decrease of the amorphous phase mobility and a weak reorganization of primary crystals were observed at the same time. Tensile tests on annealed specimens pointed out modulus and yield stress reinforcement, partial disentanglement in the amorphous phase and a raise of the volume strain. Thermally-induced microstructure evolutions were shown to enhance cavitation and slow down crack opening displacement kinetics. This last effect would result from both a raise of the yield stress in primary crystals and secondary crystallization.

Keywords

Cavitation Dynamic Mechanical Analysis Crack Opening Displacement Differential Scanning Calorimetry Thermogram Crack Opening Displacement 

Notes

Acknowledgements

Dr. J.L. Gacougnolle must be greatly acknowledged for his constant interest in this study and very precious remarks, as well as Pr. A. Dragon for his help in finalizing this paper. Authors would like to thank Arkema for financial support and PhD grant to D. Girard, and thank Dr. G. Hoschstetter for fruitful discussion.

References

  1. 1.
    G’Sell C, Hiver JM, Dahoun A (2002) Int J Solids Struct 39:3857CrossRefGoogle Scholar
  2. 2.
    Galeski A (2003) Prog Polym Sci 28:1643CrossRefGoogle Scholar
  3. 3.
    Pawlak A, Galeski A (2005) Macromol 38:9688CrossRefGoogle Scholar
  4. 4.
    Plummer CJG, Scaramuzzino P, Kausch HH, Philippoz JM (2000) Polym Eng Sci 40:1306CrossRefGoogle Scholar
  5. 5.
    Butler MF, Donald AM, Bras W, Mant GR, Derbyshire GE, Ryan AJ (1995) Macromol 28:6383CrossRefGoogle Scholar
  6. 6.
    Castagnet S, Girault S, Gacougnolle JL, Dang P (2000) Polymer 41:7523CrossRefGoogle Scholar
  7. 7.
    Zhang XC, Butler MF, Cameron RE (2000) Polymer 41:3797CrossRefGoogle Scholar
  8. 8.
    Gacougnolle JL, Castagnet S, Werth M (2006) Eng Failure Anal 13:96CrossRefGoogle Scholar
  9. 9.
    Cazenave J, Seguela R, Sixou B, Germain Y (2006) Polymer 47:3904CrossRefGoogle Scholar
  10. 10.
    Alizadeh A, Richardson L, Xu J, McCartney S, Marand H, Cheung YW, Chum S (1999) Macromol 32:6221CrossRefGoogle Scholar
  11. 11.
    Marand H, Alizadeh A, Farmer R, Desai R, Velikov V (2000) Macromol 33:3392CrossRefGoogle Scholar
  12. 12.
    Vanderhart DL, Snyder CR (2003) Macromol 36:4813CrossRefGoogle Scholar
  13. 13.
    O’Kane WJ, Young RJ, Ryan AJ (1995) J Macromol Sci, -Phys B34:427CrossRefGoogle Scholar
  14. 14.
    Neidhofer M, Beaume F, Ibos L, Bernes A, Lacabanne C (2004) Polymer 45:1679CrossRefGoogle Scholar
  15. 15.
    El Mohajir BE, Heymans N (2001) Polymer 42:5661CrossRefGoogle Scholar
  16. 16.
    El Mohajir BE, Heymans N (2001) Polymer 42:7017CrossRefGoogle Scholar
  17. 17.
    Nakagawa K, Ishida Y (1973) J Polym Sci Part B: Polym Phys 11:1503Google Scholar
  18. 18.
    Boyd RH (1985) Polymer 26:1123CrossRefGoogle Scholar
  19. 19.
    Hirschinger J, Schaefer D, Spiess HW, Lovinger AJ (1991) Macromol 24:2428CrossRefGoogle Scholar
  20. 20.
    Andre-Castagnet S, Girault S (2002) J Macromol Sci, -Phys B41:957CrossRefGoogle Scholar
  21. 21.
    Cho K, Gent AN (1988) J Mater Sci 23:141CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  1. 1.Laboratoire de Mécanique et Physique des Matériaux (UMR CNRS 6617)ENSMAFuturoscope cedexFrance
  2. 2.ArkemaCERDATOSerquignyFrance

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