The air transport environment is a low pressure environment,which will have a significant impact on the occurrence and development of fire.In order to explore the pyrolysis characteristics of civil aircraft cabin panel materials under low environmental pressure,the pyrolysis characteristics of civil aircraft cabin panels were studied by the thermogravimetric analyzer.Selecting the glass fiber/phenolic resin sandwich panel structure panel material(A panel)and the glass fiber/phenolic resin laminated panel structure panel material(B panel)of a certain type of Airbus aircraft as the research objects,and studied in Guanghan(96 kPa)and Kangding(61 kPa)of Sichuan province,respectively.The results show that the initial reaction temperature,termination temperature and maxi-mum mass loss rate temperature of thermal decomposition of A and B panels move slightly to high temperature with the decrease of pressure and the increase of heating rate.At the heating rate of 15℃/min,the upper and lower resin base panel of A panel consists of two pyrolysis stages,and there is only one pyrolysis stage of aramid honey-comb core,and the initial decomposition temperature of the resin base panel is about 182℃,which is obviously lower than that of the aramid honeycomb core,while the pyrolysis temperature of B panel is divided into two stages and the initial pyrolysis temperature is about 258℃.The pyrolysis kinetics was analyzed by the Kissinger method,the Flynn-Wall-Ozawa method,the Starink method and the KAS method.The apparent activation energy obtained by the Flynn-Wall-Ozawa method,the Starink method and the KAS method is similar,and the apparent activation energy of A and B panels under low pressure increase by approximately 10.4%and 28.5%relative to that under normal pressure,respectively.And the chemical reaction rates of A panel and B panel in 96 kPa environment are about 1.9 and 1.2 times higher than that in 61 kPa environment.
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