Tereshchenko V. Synthesis, structure and properties of epoxyurethane-silica nanocomposites

Thesis is devoted to obtaining epoxyurethane nanocomposites filled with ultralow amount of silica particles (0,001-2,0 %) from tetraetoxysilan. These particles were introduced in two ways (1 - in-situ, 2 - by ultrasonicatoin) via sol-gel method. A comparative analysis both of the structure and properties of the obtained nanocomposites was made. Key results were obtained using such methods: pyrolysis mass spectrometry, IR-spectroscopy, liquid chromatography, SAXS, WAXS, SEM, TGA, DMA, and spectrophotometry. The effect of introduction mode and the amount of the polysiloxane particles formed by sol-gel method on the structure and properties of the oligomers and polymers thereof have been found. Nanocomposites with ultralow filler content (up to 2,0% ) which have improved physical-mechanical properties and transparency were prepared. It can be used as the basis for creating an optically transparent protective coating for spacecraft solar cells.