Determination of the effect of fillers on the intumescent ability of the organic-inorganic coatings of building constructions
DOI:
https://doi.org/10.15587/1729-4061.2016.79869Keywords:
intumescent coatings, oven temperature, coating swelling kinetics, refractory fillers, coating efficiencyAbstract
The analysis of methods of determining the intumescent ability of fireretardant coatings was performed, and the need to develop reliable methods for the study of the blistering process for the creation of new types of coatings was identified. Evaluation of the swelling ratio of inorganic and organic coatings, revealed the unreliability of the real values of the kinetics of decomposition of materials. The method for determining the kinetics of swelling of coatings was validated, and with the constant heat and mass transfer conditions during the test, the device was designed. Studies of the kinetics of swelling of organicinorganic coatings by this method have shown that under prolonged exposure to high temperature, the swelling coefficient decreases due to the foamcoke burnout. The results of determining the intumescent ability of coatings when adding fillers showed that when exposed to hightemperature stream, the material burnout and the coating weight loss are reduced by more than half due to the formation of hightemperature compounds, and this increases the time to reach the limit temperature. As a result of thermogravimetric study, the weight loss of the coatings depending on the temperature was determined, the activation energy was investigated in the temperature expansion of the coatings and it was found that for organicinorganic coating, it was 18.79 kJ/mol, and in the case of the introduction of fillers – tripled. These data suggest the feasibility of the use of fillers based on oxides and hydroxides to improve the efficiency of organicinorganic coatings.
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Copyright (c) 2016 Pavlo Krivenko, Yuriy Tsapko, Sergii Guzii, Anastasiia Kravchenko
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