Abstract
As a result of the work, the influence of the polyfunctional modifier oligo (resorcinol phenyl phosphate) and the dispersed mineral filler diorite with terminal phenyl groups on the physicochemical and deformation -strength properties of epoxy composites was studied. The effectiveness of using diorite epoxide as an active polymer filler has been proven. The effectiveness of using diorite as an active filler in epoxy polymers, which increases strength and changes the physicochemical properties of epoxy composites, has been proven. The optimal composition of diorite was selected as a structural additive and filler in the composition of an epoxy composite (0.1 and 50 parts by weight), which strengthens the epoxy diorite composite. It has been established that the addition of diorite to the epoxy composition leads to an increase in the heat resistance of Vicat from 132ºС to 140-188ºС and increases the thermal stability of the epoxy composite, which is expressed in a shift in the initial degradation. In addition, the thermal decomposition of the composite increases the yield of carbon structures (from 54 to 70-77% by weight), prevents the pyrolysis products from entering the gas phase, which leads to a decrease in its flammability. The effectiveness of diorite surface functionalization has been proven using APTES, which provides chemical interaction at the polymer matrix/filler interface and also prevents aggregation of diorite particles.