The structural features of epoxy-silica nanocomposites were studied using small-angle X-ray scattering and electron microscopy. It was shown that during the formation of sols of silica nanoparticles in the presence and absence of an epoxy oligomer in the system, their aggregation processes change significantly. Using fractal analysis, the type of fractal aggregates of each structural level is identified and their sizes are determined. It has been established that for systems formed in the presence of an epoxy oligomer, a predominantly two-level fractal organization is observed, at the first level of which mass-fractal aggregates with average sizes of 10-23 nm are formed, and at the second level, depending on the concentration of nanoparticles, they can form both mass and surface fractal aggregates with average sizes of 35-55 nm.
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Translated from Teoretychna ta Eksperymentalna Khimiya, Vol. 56. No. 4, pp. 258-264, July-August, 2020.
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Zhyltsova, S.V., Leonova, N.G. & Lysenkov, E.A. Effect of Epoxy Oligomer on the Hierarchical Structure of Silica Nanoparticles Formed in a Polymer Matrix. Theor Exp Chem 56, 275–282 (2020). https://doi.org/10.1007/s11237-020-09659-x
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DOI: https://doi.org/10.1007/s11237-020-09659-x