Elastomers and Composites

The Rubber Society of Korea (한국고무학회)
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Photooxidation of BR Vulcanizate Using High Pressure Mercury Lamp

  • Received : 2014.10.21
  • Accepted : 2014.12.07
  • Published : 2015.03.31
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Abstract

Polybutadiene rubber (BR) has been well known that its physical and chemical properties are changed when it is exposed to ultraviolet light undergoing photooxidation. In this study, photooxdiation process of BR vulcanizate was investigated using a high pressure mercury lamp used as an outdoor lighting, which has high UV radiation efficiency and reasonable cost. Discoloration and crack formation of photooxdized BR vulcanite surface were examined using an image analyzer. Change of chemical functional groups of BR vulcanite surface by photooxidation was investigated using ATR-FTIR, and variation of the crosslink density with the UV irradiation time was investigated. By increasing the UV irradiation time, the crosslink density steeply increased after a period of time and did not increase any more. Formation of hydroxyl (~OH) and carbonyl (~C=O) groups on the BR vulcanizate surface increased and the1,4-cis unit was converted to the 1,4-trans unit as the photooxidation was proceeded.

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References

  1. C. Adam, J. Lacoste, and J. Lemaire, "Photo-oxidation of elastomeric materials. Part 1 - Photo-oxidation of polybutadienes", Polym. Degrad. Stab., 24, 185 (1989). https://doi.org/10.1016/0141-3910(89)90091-8
  2. Y. Tanaka, S. Kawahara, T. Ikeda, and H. Tamai, "Analysis of the sequence distribution of 1,2-units in polybutadiene by an ozonolysis-GPC method", Macromolecules, 26, 5253 (1993). https://doi.org/10.1021/ma00071a042
  3. P.-O. Bussiere, J.-L. Gardette, J. Lacoste, and M. Baba, "Characterization of photodegradation of polybutadiene and polyisoprene: chronology of crosslinking and chain-scission", Polym. Degrad. Stab., 88, 182 (2005). https://doi.org/10.1016/j.polymdegradstab.2004.02.013
  4. C. Sanglar, H. Nguyen Quoc, and M. F. Grenier-Loustalot, "Studies on thermal degradation of 1-4 and 1-2 polybutadienes in inert atmosphere", Polym. Degrad. Stab., 95, 1870 (2010). https://doi.org/10.1016/j.polymdegradstab.2010.04.021
  5. J. Cai, Q. Yu, Y. Han, X. Zhang, and L. Jiang, "Thermal stability, crystallization, structure and morphology of syndiotactic 1,2-polybutadiene/organoclay nanocomposite", Eur. Polym. J., 43, 2866 (2007). https://doi.org/10.1016/j.eurpolymj.2007.04.036
  6. M. Piton and A. Rivatonet, "Photooxidation of polybutadiene at long wavelengths (A > 300 nm)", Polym. Degrad. Stab., 53, 343 (1996). https://doi.org/10.1016/0141-3910(96)00093-6
  7. Q. Zhao, X. Li, and J. Gao, "Aging of ethylene-propylenediene monomer (EPDM) in artificial weathering environment", Polym. Degrad. Stab., 92, 1841 (2007). https://doi.org/10.1016/j.polymdegradstab.2007.07.001
  8. V.-H. Nguyen, S. D. Lin, J. C.-S. Wu, and H. Bai, "Artificial sunlight and ultraviolet light induced photo-epoxidation of propylene over V-Ti/MCM-41 photocatalyst", Beilstein J. Nanotechnol., 5, 566 (2014). https://doi.org/10.3762/bjnano.5.67
  9. J. M. Yu, X. M. Tao, H. Y. Tam, and M. S. Demokan, "Modulation of refractive index and thickness of poly(methyl methacrylate) thin films with UV irradiation and heat treatment", Appl. Surf. Sci., 252, 1283 (2005). https://doi.org/10.1016/j.apsusc.2005.02.144
  10. P. J. Flory, "Statistical mechanics of swelling of network structures", J. Chem. Phys., 18, 108 (1950). https://doi.org/10.1063/1.1747424
  11. A. J. Marzocca, A. L. Rodriguez Garraza, and M. A. Mansilla, "Evaluation of the polymer-solvent interaction parameter c for the system cured polybutadiene rubber and toluene", Polym. Test., 29, 119 (2010). https://doi.org/10.1016/j.polymertesting.2009.09.013
  12. M. D. Stelescu, E. Manaila, and G. Craciun, "Vulcanization of ethylene-propylene terpolymer-based rubber mixtures by radiation processing vulcanization of ethylene-propylene terpolymer-based rubber mixtures by radiation processing", J. Appl. Polym. Sci., 128, 2325 (2013). https://doi.org/10.1002/app.38231
  13. M. Piton and A. Rivaton, "Photo-oxidation of ABS at long wavelengths (A > 300 nm)", Polym. Degrad. Stab., 55, 147 (1997). https://doi.org/10.1016/S0141-3910(96)00116-4
  14. M. A. Golub and C. L. Stephenes, "Photoisomerization of polybutadiene", J. Polym. Sci. Part C : Polym. Symp., 16, 765 (1967).