Search academic texts

Information × Registration Number 0217U007471, 0116U002519 , R & D reports Title Screening of the effectiveness of catalysts of the oxirane ring opening. Structure of epoxy-inorganic composites popup.stage_title Head Shved Elena N., Доктор хімічних наук Registration Date 15-01-2018 Organization Donetsk State University popup.description2 A screening of the tertiary amines and tetraalkylammonium salts effectiveness as oxirane acidolysis catalysts has been performed. The effect of the structure of catalysts and their concentration on the rate of oxirane ring opening has been investigated. To study the mechanism of the tertiary amines and tetraalkylammonium salts catalytic action and to establish the mechanism of 2-(chloromethyl)oxirane oxirane ring opening, a modelling of the behavior of tetraethylammonium benzoate as a nucleophilic intermediate has been performed. The most optimal ways of nucleophilic ring opening of asymmetric oxirane have been found. It has been shown that transitional states on the reaction pathway have dissociative character. It has been established that the regioselectivity of the reaction is determined by the mechanism of the reaction. The joint effect of the temperature and structure of the acid reagent on the reaction rate of trans-2,3-bis(3-bromo-5-nitrophenyl)oxirane with Y-substituted arylsulfonic acids has been studied by the method of cross-correlation analysis. Due to the intensive interaction of the effects of structure and temperature, the physical reality of the enthalpy-entropy compensatory effect has been proved and an iso-parametric point via the structural parameter has been realized. The morphological structure and distribution of filler particles in epoxy-inorganic nanocomposites with different methods of polymeric matrix formation were established. The method of small-angle scattering of X-rays shows that, depending on the content of SiO2 and TiO2, mass-fractal and surface-fractal aggregates are formed, the size of aggregates varies with filler concentration increase. All the obtained scientific results are new. Publications were made in special journals and journals with impact factor. Product Description popup.authors Бахалова Є.А. Беспалько Юлія Миколаївна Жильцова Світлана Віталіївна Калінський Олександр Михайлович Леонова Наталя Геннадіївна Ситник Наталія Сергіївна Швед Олена Миколаївна Шпанько Ігор Вальович Ютілова Ксенія Сергіївна popup.nrat_date 2020-04-02 Close