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Year 2019 Volume 17, Issue 2 |
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Issues/2019/vol. 17 /Issue 2 |
D. L. Starokadomsky, N. V. Sigaryova, S. V. Shulga, L. M. Kokhtych, N. M. Moshkivska, A. A. Nikolaychuk, O. O. Tkachenko, M. M. Reshetnyk
«Effect of Oxidized Graphene on Mechanical Properties of Polyepoxy Composites and Their Resistance to Aggressive Medium»
311–320 (2019)
PACS numbers: 62.23.Pq, 68.37.Ps, 81.05.Zx, 81.07.Pr, 81.16.Pr, 81.70.Bt, 82.35.Np
Polymer composite materials on the base of an epoxy resin filled with graphene oxide with concentration of 0.5–5 mass.% are studied. The research is carried out for two types of composites obtained, depending on the exposure and method of obtaining. The first type of compositions is kept for 20–25 days (composites GÎ?), and the second one is kept about 6 hours (composites GÎ?). The nonmonotonic influence of filler on the mechanical parameters and chemical resistance of epoxy composites is revealed. As shown, the stability of composites in the acetone–ethyl acetate mixture and in the 25% solution of the nitric acid HNO3 depends on the method of obtaining the compositions (i.e., curing time before induration); composites GÎ? are more inert than composites GÎ?. This effect can be explained by the assumption of an optimal structure of composites GÎ?: the curled-twisted structure of GO in composites GÎ? should be less susceptible to the shale structure of composites GO?. These arguments allow us to talk about the promise of GO as an enhancement filler in the case of optimizing the technology of composite fabrication.
Key words: epoxy composite, oxidized graphene, chemical resistance, mechanical properties.
https://doi.org/10.15407/nnn.17.02.311
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