To assess an influence of climatic factors on properties of the reactive flame retardant coating "FENYKS STS" for analyzing steel building structures fire resistance for their use in coal mining. methodology. Scientific generalization and systematization, analysis of regulatory requirements for building struc tures fire resistance. Experimental study methods regarding the reaction of samples to heating, regulated by the regu lations about fire protection DSTU-N-P B V.1.1-29:2010. Fireproofing of building constructions and general re quirements and control methods. Mathematical and computer simulation of nonstationary heat exchange processes in "steel plate-fire protection coating" system. Definition of thermophysical properties and protection ability of fire protection coatings based on solving direct and inverse heat conduction problems. Findings. Based on developed twolayered physical and simulation models of fire protected steel plate, there was determined a coefficient of thermal conductivity of the "FENYKS STS" coating, which depends on temperature. The stable volumetric heat capacity has been defined. The efficiency of this coating for the protection of metal construc tions has been proved. The influence of climatic factors on thermophysical properties of the coating and its fire pro tection ability is shown. Originality. For the first time, the value of thermal conductivity for the "FENYKS STS" coating was determined after the influence of climatic factors during 3 years. The conclusion is that the fire protection ability of this coating does not change during that time. Practical value. The results will allow making more accurate estimation related to fire resistance of fire protected steel constructions for a longterm use. The studies will be useful for designers and fireretardant manufacturers, since they will allow calculating an effective fireresistance thicknesses of the covering taking into consideration its time of use.
The article considers methods of manufacturing non-toxic films of a given color that meet technological requirements. The problem of reducing the shrinkage of the colored polymer in the casting mould during cooling and maintaining its technical characteristics is experimentally solved. To this end, the influence of the nature of pigments on the degree of polymer coloring is studied, and ways to improve the quality of color are investigated. The object of the study was selected pigment concentrate based on high pressure polyethylene brand 15803-003. The pigment has chosen technical carbon grades N220, P803. Surfactants were modifying additives. Tests of samples to determine the light fastness of dye, migration resistance, the number of agglomerates of pigments, toughness and strength, physical and mechanical properties showed that the most effective additive to improve the coloring properties of soot pigment brand N220 and improve the appearance of finished products introduced into the superconcentrate calcium stearate, which at the stage of mixing in the extruder acts as a surfactant and prevents the adhesion of the pigment and the formation of agglomerates in the polymer melt.
The problems of reducing combustibility and increasing fire resistance of some polymer building materials are considered. And the toxicity of the gaseous products of their thermal degradation was evaluated both individually and in various combinations with each other. The features of thermal degradation and the loss of mechanical properties under the influence of a flame of polymer building materials were studied. The following samples were used: water pipes based on polyethylene; Tarkett linoleum, Ondex roofing products, Rolvaplast PVC profile panels; structural panels of the company "Polygal"; facing tile based on phenol-formaldehyde oligomers. The processes occurring during pyrolysis and combustion are considered, the results of a study of the combustibility and mechanical properties of polymer building materials based on polyethylene, polyvinyl chloride, polycarbonate, phenol-formaldehyde and epoxy oligomers under the influence of a flame are presented. For the studied building polymer materials, the products of pyrolysis and combustion were studied; their ignition and self-ignition temperatures, and also the flame propagation velocity were measured. The data on the toxicity of the products of their combustion, both individually and under combined action, are summarized. Also, for the studied polymer building materials, the losses of heat resistance, toughness, and flexural strength under the influence of a flame were studied. Thermogravimetric analysis of Rolvaplast PVC panels and Poligal polycarbonate panels allowed us to determine the maximum temperatures and activation energies of the polymer decomposition process. It was concluded that if the material is recognized as non-combustible or slow-burning, it will not always be fire resistant, since its strength and thermal properties can sharply decrease already in the first seconds of flame exposure.
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