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Information × Registration Number 0211U007492, 0110U003467 , R & D reports Title Sol-gel synthesis of epoxy-siloxane composites and their resistance to thermooxidative destruction popup.stage_title Head Mykhalchuk Volodymyr Mykhajlovych, Registration Date 30-05-2011 Organization Donetsk National University popup.description2 Object of inverstigation - epoxy-silica nanocomposites, synthesized via the sol-gel technology using anhydride curing of epoxy. The goal of the work is establishment of the basic regularities of structure formation of epoxy-silica nanocomposites, obtained via the sol-gel method of silica filler formation and anhydride curing of epoxy to form an organic matrix. Methods used - scanning electron microscopy, transmission electron microscopy, photocolorymetry, small-angle X-ray scattering, chemical analysis. The possibility of side reactions during the sol-gel synthesis of epoxy-silica nanocomposites cured with acid anhydride was established. It was shown that opening of epoxy ring with nitric acid (hydrolysis catalyst) can occure when silica is formed in the presence of epoxy resin. As ethanol is an essential component of the sol-gel process it leads to anhydride ring opening reaction. Taking into account possible negative consequences of the side reactions in hybrids' formation process the technique of synthesis of epoxy-silica nanocomposites cured with acid anhydrides via the sol-gel method was developed. This technique provides obtaining of optically transparent materials with filler content up to 10 mass%. It was shown that presence of the compatibilizer leads to formation of more stable sols. It was established that the higher the silica filler content in the composition the larger silica species form. It was shown that in "small additions range" of filler the spatial cluster of silica particles forms. It can improve the physico-mechanical properties of the composites. The results of investigations can be proposed for development of novel polymer materials in Ukrainian state research institute of plastic masses, The Institute of Macromolecular chemistry of the NAS of Ukraine, Antonov ASTC etc. Product Description popup.authors Жильцова Світлана Віталіївна Леонова Наталя Геннадіївна Лига Рита Іванівна Лугова Ганна Олександрівна Михальчук Володимир Михайлович popup.nrat_date 2020-04-02 Close