一、前言随着航空事业的发展,飞机着火事故日益增多。近年来,飞机防火安全问题越来越引起人们的重视,对航空材料也提出了新的要求。美国家材料咨询委员会对聚合物材料的防火安全性能提出了六项评定标准,即:着火的难易程度,火焰蔓延的程度,释放热量的大小,产生烟的多少,燃烧产物的毒性,熄灭的难易程度等。为了进一步减少飞机火灾的损失,除了增加防火防爆设备、提高易燃油料的抗燃性和采取应急离机等措施外,还要求飞机结构使用更 I. Introduction With the development of aviation, the number of aircraft fire accidents is on the increase. In recent years, the issue of aircraft fire safety has drawn more and more attention and put forward new requirements on aviation materials. American National Materials Advisory Committee proposed six criteria for the fire safety performance of polymeric materials, namely: the ease of ignition, the degree of flame spread, the amount of heat released, the amount of smoke produced, the toxicity of the combustion products, the extinguished Ease and so on. In order to further reduce the loss of aircraft fire, in addition to increasing fire and explosion-proof equipment, to improve the flammability of flammable fuel and emergency measures such as off-machine, but also requires the use of aircraft structures more