Advertisement

Strength of Materials

, Volume 51, Issue 4, pp 660–666 | Cite as

Acidic-Thermal Ageing Effect on Compression Stress Relaxation of Silicone Rubber

  • G. LiEmail author
  • J. M. Gong
  • J. Z. Tan
  • D. S. Zhu
  • W. H. Jia
  • X. J. Lu
Article
  • 8 Downloads

The compression properties of silicone rubbers used as gaskets in PEM fuel cells are studied. The specimens are aged under different test conditions, viz, high temperature, humid air, and acidic solutions, prepared to match real PEM fuel cell operation conditions. The compression and stress relaxation tests are conducted. Temperature, humid air and acidic solution exert a serious effects on the mechanical performance of silicone rubbers. All the three factors can cause an increase in the stress relaxation modulus and permanent compression deformation. The effects of high temperature and an acidic solution are more pronounced. This can accelerate the deterioration of mechanical properties and decrease the sealing efficiency of gaskets, which would influence the durability of PEM fuel cells. It creates the basis for life prediction of silicone rubbers under appropriate accelerated durability test conditions.

Keywords

stress relaxation compression silicone fuel cell 

Notes

Acknowledgments

This study was sponsored by the National Natural Science Foundation of China (Nos. 51505212, 51505211, and 11302097) and Open Research Fund of Jiangsu Collaborative Innovation Center for Smart Distribution Network, Nanjing Institute of Technology, China (No. XTCX201609).

References

  1. 1.
    G. Li, J. Z. Tan, and J. M. Gong, “Chemical aging of the silicone rubber in a simulated and three accelerated proton exchange membrane fuel cell environments,” J. Power Sources, 217, 175–183 (2012).CrossRefGoogle Scholar
  2. 2.
    J. Tan, Y. J. Chao, M. Yang, et al., “Degradation characteristics of elastomeric gasket materials in a simulated PEM fuel cell environment,” J. Mater. Eng. Perform., 17, 785–792 (2008).CrossRefGoogle Scholar
  3. 3.
    G. Li, J. Z. Tan, J. M. Gong, and W. H. Jia, “Degradation mechanism of the silicone rubber in simulated PEM fuel cell environments,” J. Chem. Ind. Eng. (China), 65, No. 9, 3669–3675 (2014).Google Scholar
  4. 4.
    J. Tan, Y. J. Chao, M. Yang, et al., “Chemical and mechanical stability of a Silicone gasket material exposed to PEM fuel cell environment,” Int. J. Hydrogen Energy, 36, 1846–1852 (2011).CrossRefGoogle Scholar
  5. 5.
    Y. Chen, K. Hou, C. Lin, et al., “A synchronous investigation of the degradation of metallic bipolar plates in real and simulated environments of polymer electrolyte membrane fuel cells,” J. Power Sources, 197, 161–167 (2012).CrossRefGoogle Scholar
  6. 6.
    C. Lin, C. Chien, J. Tan, et al., “Chemical degradation of five elastomeric seal materials in a simulated and an accelerated PEM fuel cell environment,” J. Power Sources, 196, 1955–1966 (2011).CrossRefGoogle Scholar
  7. 7.
    T. Cui, C.-W. Lin, C. H. Chien, et al., “Service life prediction of seal in PEM fuel cells,” in: Proc. of the SEM Annual Conf. (June 7–10, 2010, Indianapolis, Indiana, USA) (2010), https://doi.org/10.1007/978-1-4419-9798-2_4.CrossRefGoogle Scholar
  8. 8.
    T. Cui, Y. J. Chao, and J. W. Van Zee, “Stress relaxation behavior of EPDM seals in polymer electrolyte membrane fuel cell environment,” Int. J. Hydrogen Energy, 37, 13478–13483 (2012).CrossRefGoogle Scholar
  9. 9.
    T. Cui, Y. J. Chao, and J. W. Van Zee, “Stress relaxation behavior of a liquid silicone rubber seal subjected to temperature cycling,” J. Electrochem. Soc., No. 16, 1037–1037 (2011).Google Scholar
  10. 10.
    R. Elleuch and W. Taktak, “Viscoelastic behavior of HDPE polymer using tensile and compressive loading,” J. Mater. Eng. Perform., 15, No. 1, 111–116 (2006).CrossRefGoogle Scholar
  11. 11.
    D. Santiago, F. Ferrando and S. De la Flor, “Influence of holding time on shape recovery in a polyurethane shape-memory polymer,” J. Mater. Eng. Perform., 23, No. 7, 2567–2573 (2014).CrossRefGoogle Scholar
  12. 12.
    J. Zhao, R. Yang, R. Iervolino, et al., “The effect of thermo-oxidation on the continuous stress relaxation behavior of nitrile rubber,” Polym. Degrad. Stabil., 115, 32–37 (2015).CrossRefGoogle Scholar
  13. 13.
    V. A. Fernandes and D. S. De Focatiis, “The role of deformation history on stress relaxation and stress memory of filled rubber,” Polym. Test., 40, 124–132 (2014).CrossRefGoogle Scholar
  14. 14.
    J. Liu, P. Lin, X. Li, and S. Q. Wang, “Nonlinear stress relaxation behavior of ductile polymer glasses from large extension and compression,” Polymer, 81, 129–139 (2015).CrossRefGoogle Scholar
  15. 15.
    H. Li, B. Zhang, and G. Bai, “Effects of constructing different unit cells on predicting composite viscoelastic properties,” Compos. Struct., 125, 459–466 (2015).CrossRefGoogle Scholar
  16. 16.
    K. V. Rao, G. S. Ananthapadmanabha, and G. N. Dayananda, “Effect of cross-linking density on creep and recovery behavior in epoxy-based shape memory polymers (SMEPs) for structural applications,” J. Mater. Eng. Perform., 25, No. 12, 5314–5322 (2016).CrossRefGoogle Scholar
  17. 17.
    E. A. Pieczyska, M. Maj, K. Kowalczyk-Gajewska, et al., “Mechanical and infrared thermography analysis of shape memory polyurethane,” J. Mater. Eng. Perform., 23, No. 7, 2553–2560 (2014).CrossRefGoogle Scholar
  18. 18.
    T. Rey, G. Chagnon, J.-B. Le Cam, and D. Favier, “Influence of the temperature on the mechanical behaviour of filled and unfilled silicone rubbers,” Polym. Test., 32, No. 3, 492–501 (2013).CrossRefGoogle Scholar
  19. 19.
    A. Kömmling, M. Jaunich, and D. Wolff, “Effects of heterogeneous aging in compressed HNBR and EPDM O-ring seals,” Polym. Degrad. Stabil., 126, 39–46 (2016).CrossRefGoogle Scholar
  20. 20.
    T. K. Vaidyanathan and J. Vaidyanathan, “Validity of predictive models of stress relaxation in selected dental polymers,” Dent. Mater., 31, No. 7, 799–806 (2015).CrossRefGoogle Scholar
  21. 21.
    H. J. Maria, N. Lyczko, A. Nzihou, et al., “Stress relaxation behavior of organically modified montmorillonite filled natural rubber/nitrile rubber nanocomposites,” Appl. Clay Sci., 87, 120–128 (2014).CrossRefGoogle Scholar
  22. 22.
    K. Yamaguchi, A. G. Thomas, and J. J. Busfield, “Stress relaxation, creep and set recovery of elastomers,” Int. J. Nonlin. Mech., 68, 66–70 (2015).CrossRefGoogle Scholar
  23. 23.
    GB/T 7759.1-2015. Rubber, Vulcanized or Thermoplastic – Determination of Compression Set – Part 1: At Ambient or Elevated Temperatures, National Standards of People’s Republic of China (2015).Google Scholar
  24. 24.
    GB/T 1685-2008. Rubber, Vulcanized or Thermoplastic – Determination of Stress Relaxation in Compression at Ambient and at Elevated Temperatures, National Standards of People’s Republic of China (2008).Google Scholar
  25. 25.
    Y. Wu, D. Wang, W. Zhang, and J. Zhang, “Experimental research of thermal-oxidative aging on the mechanics of aero-NBR,” J. Test. Eval., 42, No. 3, 568–572 (2014).CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • G. Li
    • 1
    Email author
  • J. M. Gong
    • 2
  • J. Z. Tan
    • 2
  • D. S. Zhu
    • 1
  • W. H. Jia
    • 1
  • X. J. Lu
    • 1
  1. 1.College of Mechanical EngineeringNanjing Institute of TechnologyNanjingChina
  2. 2.School of Mechanical and Power EngineeringNanjing Tech UniversityNanjingChina

Personalised recommendations