ABSTRACT:Results are reported of research on intumescent composites based on epoxy resin cross-linked with polyethylene polyamine and containing ammonium polyphosphate and such modifying additives as calcium borate, manganese dioxide, nickel, and chromium, containing tubulenes as gas-formers and carbonization stimulators. The changes in composition and physicochemical properties of modified compositions under conditions of heat and fire were investigated by X-ray photo-electron spectroscopy, atomic force microscopy, and local force spectroscopy. Ammonium polyphosphate mainly stimulates carbonization processes on the inner surface of a bubble being formed during foam coke formation. The introduction of metal-containing tubulenes leads to the formation of fire-retardant and low flammability-compositions with high coke and carbon structures content. The use of calcium borate in the compositions considerably increases the strength of foam coke being formed.
The utilization of construction materials based on polymers is considerably limited by their low fire-safety and insignificant durability. In this paper the investigations results of construction on composite including up to 30% of the volume of foam polyethylene waste are discussed. Its destruction during the fire action and also utilization is limited by a cement concrete matrix which has a traditional composition. The composition optimization to thermal conductivity value is carried out. The aggregate of amorphous structure in the form of ash-slag waste is used to decrease concrete thermal conductivity.
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