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Journal of Failure Analysis and Prevention

, Volume 18, Issue 3, pp 628–634 | Cite as

Failure Analysis of Nitrile Rubber O-Rings Static Sealing for Packaging Barrel

  • Xiao-qin Wei
  • Hu-lin Wu
  • Lun-wu Zhang
  • Shi-yan Zhang
  • Yong Xiao
  • Tian-yuan Luo
Technical Article---Peer-Reviewed

Abstract

Nitrile rubber O-rings seals for packaging barrel was stored in China tropical marine atmosphere environments for 10 years, and then the sealing function of nitrile rubber O-ring was failed. By comparing the molecular structure, cross-link density, thermal decomposition, content of elements and chemical functional groups of the original nitrile rubber seals, the surface and interior of nitrile rubber seals storage for 10 years, a long-term natural failure mechanism was studied. The results showed that: the surface content of dibutyl phthalate and dibutyl sebacate, the surface carbonyl peak height and the surface content of oxygen element were higher than that in internal; the surface cross-link density was lower than that in internal but still higher than in original sample; and surface carbon- to-oxygen ratio were lower than that in internal and original sample. After aging for 10 years, the weight loss of plasticizer decreased, and the main chain content increased. It can be inferred that nitrile rubber mainly undergoes oxygen-absorbing cross-linking reaction to form carboxylic acids and esters, which is accompanied by the migration and enrichment of two plasticizers to the surface, causing reductions in elasticity and elasticity. The residual permanent compression set was lower than the design critical value, and the sealing function for the packaging barrel was lost, and a leak occurred.

Keywords

Characterization Compression Failure analysis Microstructure Oxidation Failure mechanism 

References

  1. 1.
    C. Ai, G. Gong, X. Zhao, P. Liu, Macroporous hollow silica microspheres-supported palladium catalyst for selective hydrogenation of nitrile butadiene rubber. J. Taiwan Inst. Chem. Eng. 77(5), 250–256 (2017)CrossRefGoogle Scholar
  2. 2.
    M.A. Misman, A.R. Azura, Z.A. Hamid, The physical and degradation properties of starch-graft-acrylonitrile/carboxylated nitrile butadiene rubber latex films. Carbohydr. Polym. 128(4), 1–10 (2015)CrossRefGoogle Scholar
  3. 3.
    K. Prukkaewkanjana, S. Thanawan, T. Amornsakchai, High performance hybrid reinforcement of nitrile rubber using short pineapple leaf fiber and carbon black. Polym. Test. 45(8), 76–82 (2015)CrossRefGoogle Scholar
  4. 4.
    P. Annadurai, S. Kumar, T. Mukundan, R. Joseph, P. Sarkar, S. Chattopadhyay, Effect of nanostructures of modified clay–carbon black on physico-mechanical, electrical, and acoustic properties of elastomer-based composites. Polym. Compos. 66(6), 69–75 (2014)Google Scholar
  5. 5.
    R.V. Sreelekshmi, J.D. Sudha, A.R.R. Menon, Novel organomodified kaolin/silica hybrid fillers in natural rubber and its blend with polybutadiene rubber. Polym. Bull. 74(3), 783–801 (2017)CrossRefGoogle Scholar
  6. 6.
    G.P. Karpacheva, A.D. Litmanovich, G.N. Bondarenko, L.M. Zemtsov, L.B. Krentsel, The effect of IR radiation on structurization of butadiene-nitrile rubber. Polym. Sci. Ser. A 52(8), 787–793 (2010)CrossRefGoogle Scholar
  7. 7.
    E.A. Khorova, G.I. Razdyakonova, S. Ya Khodakova, Effect of the structure of hydrogenated butadiene-nitrile rubber on the resistance to aggressive media and high temperatures. Proc. Eng. 152(12), 556–562 (2016)CrossRefGoogle Scholar
  8. 8.
    L. Pan, J.Z. Tan, X.M. Han, P. Li, W.J. Zhang, Effects of elevated temperature and crude oil on the properties of a hydrogenated nitrile butadiene rubber elastomer. J. Appl. Polym. Sci. 135(7), 45864 (2016)Google Scholar
  9. 9.
    F.N. Linhares, M. Kersch, U. Niebergall, V. Atlstädt, C.R.G. Furtado, Effect of different sulphur-based crosslink networks on the nitrile rubber resistance to biodiesel. Fuel 191(3), 130–139 (2017)CrossRefGoogle Scholar
  10. 10.
    Z. Jin, L. He, Y.L. Zhao, Fatigue life prediction of rubber isolator based on force-controlled temperature-accelerated fatigue experiment. J Fail. Anal. Prev. 17(4), 774–779 (2017)CrossRefGoogle Scholar
  11. 11.
    B. Alcock, J.K. Jørgensen, The mechanical properties of a model hydrogenated nitrile butadiene rubber (HNBR) following simulated sweet oil exposure at elevated temperature and pressure. Polym. Test. 46(9), 50–58 (2015)CrossRefGoogle Scholar
  12. 12.
    R. Bernstein, K.T. Gillen, Predicting the lifetime of fluorosilicone O-rings. Polym. Degrad. Stab. 94(12), 2107–2113 (2009)CrossRefGoogle Scholar
  13. 13.
    X.R. He, T.X. Li, Z.R. Shi, X. Wang, F. Xue, Z.H. Wu, Q. Chen, Thermal-oxidative aging behavior of nitrile-butadiene rubber/functional LDHs composites. Polym. Degrad. Stab. 133(11), 219–226 (2016)CrossRefGoogle Scholar
  14. 14.
    J.H. Zhao, R. Yang, R. Iervolino, B.V.D. Vorst, S. Barbera, The effect of thermo-oxidation on the continuous stress relaxation behavior of nitrile rubber. Polym. Degrad. Stab. 115(3), 32–37 (2015)CrossRefGoogle Scholar
  15. 15.
    A. Lattuati-Derieux, S. Thao-Heu, B. Lavédrine, Assessment of the degradation of polyurethane foams after artificial and natural ageing by using pyrolysis-gas chromatography/mass spectrometry and headspace-solid phase microextraction–gas chromatography/mass spectrometry. J. Chromatogr. A 1218(28), 4498–4508 (2011)CrossRefGoogle Scholar
  16. 16.
    P. Kusch, V. Obst, D. Schroeder-Obst, W. Fink, G. Knupp, J. Steinhaus, Application of pyrolysis–gas chromatography/mass spectrometry for the identification of polymeric materials in failure analysis in the automotive industry. Eng. Fail. Anal. 35(26), 114–124 (2013)CrossRefGoogle Scholar
  17. 17.
    X. Liu, J.H. Zhao, R. Yang, R. Iervolino, S. Barbera, A novel in situ aging evaluation method by FTIR and the application to thermal oxidized nitrile rubber. Polym. Degrad. Stab. 128(6), 99–106 (2016)CrossRefGoogle Scholar
  18. 18.
    Y. Xiong, G.S. Chen, S.Y. Guo, G.X. Li, Lifetime prediction of NBR composite sheet in aviation kerosene by using nonlinear curve fitting of ATR-FTIR spectra. J. Ind. Eng. Chem. 19(5), 1611–1616 (2013)CrossRefGoogle Scholar
  19. 19.
    J. Liu, X.B. Li, L.K. Xu, P.Q. Zhang, Investigation of aging behavior and mechanism of nitrile-butadiene rubber (NBR) in the accelerated thermal aging environment. Polym. Test. 54(9), 59–66 (2016)Google Scholar
  20. 20.
    D. Oldfield, T. Symes, Long term natural ageing of silicone elastomers. Polym. Test. 15(2), 115–128 (1996)CrossRefGoogle Scholar
  21. 21.
    F.Y. Zhang, Compression set change and its prediction of 16 kinds of practical formulation vulcanizates for long-term indoor natural ageing. Spec. Purp. Rubber Products 23(4), 46–49 (2002)Google Scholar
  22. 22.
    G.B. Zhang, Y.J. Mou, G.L. Liu, Y.C. Cui, B.G. Wang, Aging mechanism analysis of silicone rubber during long term storage. J. Acad. Armor. Force Eng. 30(1), 104–110 (2016)Google Scholar
  23. 23.
    P.Y. Le Gac, V. Le Saux, M. Paris, Y. Marco, Ageing mechanism and mechanical degradation behaviour of polychloroprene rubber in a marine environment: comparison of accelerated ageing and long term exposure. Polym. Degrad. Stab. 97(3), 288–296 (2012)CrossRefGoogle Scholar

Copyright information

© ASM International 2018

Authors and Affiliations

  • Xiao-qin Wei
    • 1
  • Hu-lin Wu
    • 1
  • Lun-wu Zhang
    • 1
  • Shi-yan Zhang
    • 1
  • Yong Xiao
    • 1
  • Tian-yuan Luo
    • 1
  1. 1.Chongqing Engineering Research Center for Environmental Corrosion and ProtectionSouthwest Technology and Engineering Research InstituteChongqingPeople’s Republic of China

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