Thermal Protection Materials (TPM) such as carbon/phenolic composites are used to protect spacecraft structures from extreme conditions. This protection is, in part, achieved by the decomposition via pyrolysis of the phenolic resin. Finite rate chemistry models are however still unable to predict the chemical production rates and composition of the pyrolysis products accurately. This is mostly due to the scarcity of experimental data for model validation. In this work, the decomposition of a phenolic material representative of thermal protection material is studied in a unique micro-pyrolysis unit for the temperature range 300-800 °C. This unit is equipped with highly sensitive detectors allowing us to identify and quantify products in a broad range of molecular weights up to 240 g mol⁻¹. More than 50 different products of the pyrolysis of phenolic resin have been quantified with a mass balance closure greater than 80%. The major compound groups found are permanent gases, phenols as well as larger molecules such as diphenols and naphthalenes. In addition, the char yield obtained at the fast heating rates employed in our apparatus was found $\sim 5\text{\%}$-points lower compared to traditional thermogravimetry.

碳/酚醛复合材料等热保护材料 (TPM) 用于保护航天器结构免受极端条件的影响。这种保护部分是通过酚醛树脂的热解分解来实现的。然而，有限速率化学模型仍然无法准确预测热解产物的化学生产率和组成。这主要是由于缺乏用于模型验证的实验数据。在这项工作中，在 300-800  °C的温度范围内，在独特的微热解装置中研究了代表热保护材料的酚类材料的分解。该装置配备高灵敏度检测器，使我们能够识别和量化分子量高达 240 g  mol ^-1的广泛范围的产品. 超过 50 种不同的酚醛树脂热解产物已被量化，质量平衡闭合率大于 80%。发现的主要化合物组是永久性气体、酚类以及较大的分子，如二酚和萘。此外，发现在我们的设备中采用的快速加热速率下获得的焦炭产率$～5\text{\%}$- 与传统的热重法相比，点数较低。