ДОСЛІДЖЕННЯ ОКРЕМИХ АСПЕКТІВ ВОГНЕЗАХИСТУ ДЕРЕВИНИ СПУЧУЮЧИМ ЛАКОМ

Abstract

The effectiveness of the use of flat lacquer for wood fire protection is determined. For this purpose, a study was conducted to determine the mechanism of protection by the rate of thermal destruction and the formation of volatile combustible gases. With long-term action of high temperature, the coating provides adequate timber thermal decomposition, namely low weight loss and low dynamics of flue gas temperature rise during testing. Studies using thermogravimetry and gas chromatography indicate that the mechanism of flame retardant efficiency is directed towards the formation on the surface of the coke layer. The presence of a protective lacquer on the surface of the wood during thermal action changes the process of thermal destruction, reduces the amount of combustible gases that are phlegmatized by a large amount of nitrogen and carbon dioxide, which is accordingly confirmed by the results of determination of the flammability group.