聚丙烯腈织物热稳定性与燃烧特性研究

对聚丙烯腈(PAN)织物在空气气氛下的热稳定性和3种热辐射强度下的燃烧特性进行研究。结果表明，PAN织物在空气气氛中的热分解过程主要包括3个失重阶段；随着热辐射强度的增大，PAN织物点燃时间有所提前，热释放速率和产烟率的峰值均得到了一定程度的提高，到达峰值的时间均有不同程度的提前，质量损失率增加，且初始热分解时间提前；当热辐射强度为25 kW/m2时，PAN织物的燃烧不充分，烟密度最大；热辐射强度越大，烟气扩散越快，且PAN织物的火灾性能指数值减小，火灾增长指数值增大；PAN织物具有较高的火灾危险性。

tudy on thermal stability and combustion characteristics of polyacrylonitrile fabric

The thermal stability of PAN fabrics under air atmosphere conditions and combustion characteristics under three thermal radiation intensity conditions were investigated. The results showed that the thermal decomposition process of PAN fabric in air atmosphere mainly consists of three weight loss stages. With the increase of heat radiation intensity, the ignition time of PAN fabric is advanced; the peak of heat release rate and smoke production rate are increased to some extent, and the time to peak heat release rate was advances to different degrees; the mass loss rate is increased and the initial thermal decomposition time is advanced. The smoke density of PAN fabric is the highest when the thermal radiation intensity is 25 kW/m2 as the combustion is inadequate. The greater the heat radiation intensity, the faster the smoke diffusion. The fire performance index value decreases and the fire growth index value increases which indicates that the PAN fabric has a higher fire hazard.