Martuniyk I. Martynyuk І.S. Features of structure formation and properties of organic and inorganic interpenetrating polymer networks (IPNs) based on polyurethane and titanium-containing copolymer

The dissertation is devoted to study of structure and properties of organic-inorganic IPNs (OI IPN) containing titanium chemically bonded to one of the IPN constituents. It was shown by spectroscopic studies that the condensation reaction hydroxyethyl methacrylate and titanium isopropoxide, titanium component is chemically bonded to one of the IPN constituents. Kinetic study results showed that with increase content of titanium isopropoxide decrease reduced rate of formation of OI IPN. DMA data showed that he OI IPN are two-phase polymer systems. With the increase in the content of the titanium component increases the effective crosslink density OI IPN study, that shows an increase in the amount of chemical crosslinks and topological links. It is shown that incorporation of Ti-component in composition IPN improves thermal stability, mechanical strength and light transmittance, the value of which reaches 90-91% at a wavelength of 700 nm, the polymer systems studied. The synthesized OI IPN containing chemically bonded titanium exhibited reverse UV-induced transition, which leads to the appearance of the absorption band in the visible region of the spectrum and allows to use it for the optical information recording at the laser irradiation.