The influence of the fire exposure on the degradation mechanism of thin carbon/epoxy and carbon/polyphenylene sulphide (PPS) laminates has been investigated using a propane burner. The burner used in this work is able to provide a controlled and repeatable heating condition, with the test condition of 106 kW/m² representative of a severe fire condition. Mass loss and temperature measurements made during the fire aggression coupled with post-fire microscopic analysis aim at providing a better understanding of the physical and mechanical changes on laminates depending on matrix nature and different fire-exposure times. For a high heat flux, a 300s fire exposure is more detrimental for the carbon/epoxy sample (22% mass loss) than for the carbon/PPS (6% mass loss) although ATG results show a similar char yield of around 75% under nitrogen for both materials. Observation and analysis of microscopic images after different fire-exposure times fire suggest that the thermal behaviour of the 2 mm thin laminates is driven by the formation of major delamination and macroscopic pores forming a thermal barrier as the analysis of the images indicates a void content 2 to 5 times higher for the carbon/PPS sample than for the carbon/epoxy specimens. On the one hand, the degradation of the thermoplastic PPS matrix into a viscous product seems to trap pyrolysis gases into macroscopic gaseous cells. These porosities provide an efficient thermal barrier protecting the back surface from the flame high thermal flux. On the other hand the degradation of the thermosetting epoxy matrix forms a dry network of carbon fibres and porous char.

已经使用丙烷燃烧器研究了火灾对薄碳/环氧树脂和碳/聚苯硫醚（PPS）层压板降解机理的影响。这项工作中使用的燃烧器能够提供可控且可重复的加热条件，测试条件为106 kW / m ²代表严重的火灾情况。火灾侵略期间进行的质量损失和温度测量，再加上火灾后的微观分析，旨在更好地了解层压板的物理和机械变化，具体取决于基体的性质和不同的暴露时间。对于高热通量，碳/环氧样品（质量损失为22％）的300s火灾比碳/ PPS（质量损失为6％）更有害，尽管ATG结果显示，在200℃下，炭的收率相似，约为75％。两种材料都使用氮气。在不同的火灾暴露时间后观察和分析显微图像，表明2 mm薄层压板的热行为是由主要分层的形成和形成热障的宏观孔隙驱动的，因为图像分析表明空隙含量2碳/ PPS样品比碳/环氧树脂样品高5倍。一方面，热塑性PPS基质降解成粘性产物似乎将热解气体捕获到宏观气态细胞中。这些孔隙率提供了有效的热障，可保护背面免受火焰高热通量的影响。另一方面，热固性环氧基质的降解形成了碳纤维和多孔炭的干燥网络。一方面，热塑性PPS基质降解成粘性产物似乎将热解气体捕获到宏观气态细胞中。这些孔隙率提供了有效的热障，可保护背面免受火焰高热通量的影响。另一方面，热固性环氧基质的降解形成了碳纤维和多孔炭的干燥网络。一方面，热塑性PPS基质降解成粘性产物似乎将热解气体捕获到宏观气态细胞中。这些孔隙率提供了有效的热障，可保护背面免受火焰高热通量的影响。另一方面，热固性环氧基质的降解形成了碳纤维和多孔炭的干燥网络。