Chulieieva O. 3) Synthesis of technologies for producing fire-resistant polyolefin compositions for cable products

The dissertation is devoted to the solution of an important scientific and technical problem of creating technologies for producing fire-resistant polyolefin compositions for cable products with regulated technological and operational properties. Specified regularities of change of the complex of properties of low-density polyethylene (LDPE) and linear low-density polyethylene (LLDPE) filled with halogenic fire-retardant agents using crosslinking systems based on bifunctional organosilicon compounds due to the directional adjustment of the hydrolytic polycondensation process were established. Increasing the temperature constancy of polyethylenes was carried out by chemical crosslinking using bifunctional organosilicon compounds. The idea of changing the molecular and supramolecular structure of polymer compositions due to the formation of cross-linkages as a result of linking bifunctional compounds by crosslinking in the process of hydrolytic polycondensation, which lead to increased temperature constancy of polymer compositions, received further development. A set of methods that had positive impact on the reduction of the in flammableness of the material, the ability to maintain and spread combustion were used in the process of developing and using fire-resistant compositions that were capable of crosslinking with silanes. Mixtures of Sb2O3 with bromine and organochlorine compounds were used as fire-retardant agents. The maximum synergistic effect during the attenuation of Sb2O3 was carried out in a ratio of 1:3 with halogen compounds.