PSI - Issue 30

E.S. Petukhova et al. / Procedia Structural Integrity 30 (2020) 105–112 Petukhova E.S. and Fedorov A.L. / Structural Integrity Procedia 00 (2020) 000–000

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In composites containing stabilizers, which can effectively neutralize alkyl radicals, there are almost no crosslinking reactions, thus, vinylidene bonds accumulate, and embrittlement of the material is delayed until the stabilizer runs out. The stabilizers СО 3 and СО 4 are more effective than Stafen because they have in their composition spatially hindered phenols and sulfide bonds, which independently have stabilizing (inhibiting such reactions) properties. 4. Conclusions For the study, we have performed accelerated climate tests of polyethylene electrically conductive composites used for the production of reusable fuel containers for supplying petroleum products to the population of remote areas of the Republic of Sakha (Yakutia). Based on the IR spectroscopy method, the study of polyethylene composites shows that under artificial aging by UV radiation, there are numerous reactions and a large number of final and intermediate products. The following products were detected: carboxylic acids, esters, aldehydes, and compounds containing vinylene and vinylidene groups. There is a decrease in the number of vinyl groups after irradiation that can be explained by competitive reactions under UV radiation and the transformation of the vinyl groups into vinylene ones due to interacting with alkyl radicals. It is shown that a high concentration of vinylidene groups can indicate the effectiveness of the stabilizer against UV radiation. The obtained results are in good agreement both with the results of previous studies of the mechanical properties and structure of the same composites during long-term climatic tests and with the ones described in works by other authors. Acknowledgements The work was performed as part of the implementation of the State Assignment AAAA-A17-117040710038-8. References Abdelhafidi, A., Babaghayou, I. M., Chabira, S.F., Sebaa, M., 2015. Impact of solar radiation effects on the physicochemical properties of polyethylene (PE) plastic film. Procedia - Social and Behavioral Sciences 195, 2922 – 2929. Andrady, A. L., Hamid, S. H., Hu, X., Torikai, A., 1998. Effects of increased solar ultraviolet radiation on materials. Journal of Photochemistry and Photobiology B: Biology 46, 96–103. Antipov, J. V., Gusev, K. I., Murashov, B. A., 2012. Epoxy binder for reinforced plastic. RU2505568C1. Aragão, B. J. G. de, Messaddeq, Y., 2008. Peak separation by derivative spectroscopy applied to FTIR analysis of hydrolized silica. Journal of the Brazilian Chemical Society 19(8), 1582–1594. doi:10.1590/s0103-50532008000800019. Carlsson, D. J., Wiles, D. M., 1969. The Photodegradation of Polypropylene Films. II. Photolysis of Ketonic Oxidation Products. Macromolecules 2(6), 587–597. doi:10.1021/ma60012a006. De la Rie, E. R., 1988. Polymer Stabilizers. A Survey with Reference to Possible Applications in the Conservation Field. Studies in Conservation 33(1), 9. doi:10.2307/1506236. Gardette, M., Perthue, A., Gardette, J.-L., Janecska, T., Földes, E., Pukánszky, B., Therias, S., 2013. Photo- and thermal-oxidation of polyethylene: Comparison of mechanisms and influence of unsaturation content. Polymer Degradation and Stability 98(11), 2383–2390. doi:10.1016/j.polymdegradstab.2013.07.017. Gerasimov, A. I., 2013. Device for aging. RU136172U1. Gijsman, P., 2012. Polymer Stabilization, in “Handbook of Environmental Degradation of Materials” . In: Kutz, M. (Ed.). William Andrew, New York , 673–714. doi:10.1016/b978-1-4377-3455-3.00023-7. Gray, R. L., 1998. Hindered amine light stabilizers: recent developments. Plastics Additives. Polymer Science and Technology Series 1, 360-371. Hamzah, M., Khenfouch, M., Rjeb, A., Sayouri, S., Houssaini, D. S., Darhouri, M., Srinivasu, V., 2018. Surface chemistry changes and microstructure evaluation of low density nanocluster polyethylene under natural weathering: A spectroscopic investigation. Journal of Physics: Conference Series, 984, 012010. doi:10.1088/1742-6596/984/1/012010. Hashim, M. J., Kawaeed, S. N., 2011. Effects of Cross-Linking on the Hydrostatic Pressure Testing for HDPE Pipe Material using Electron Beam Machine. NTC 2011: Nuclear Technical Convention 2011, Malaysia. Huang, Z., Ding, A., Guo, H., Lu, G., Huang, X., 2016. Construction of Nontoxic Polymeric UV-Absorber with Great Resistance to UV Photoaging. Scientific Reports 6, 25508. Kalsi, P. S., 1995. Spectroscopy of organic compounds (2nd ed). Wiley Eastern Ltd.: New Age International Publishers Ltd, New Delhi, 456 p. Krehula, L. K., Katan č i ć , Z., Siro č i ć , A. P., Hrnjak-Murgi ć , Z., 2013. Weathering of High-Density Polyethylene-Wood Plastic Composites. Journal of Wood Chemistry and Technology 34(1), 39–54. doi:10.1080/02773813.2013.827209.