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Quantitative determination of species production from the pyrolysis of the Phenolic Impregnated Carbon Ablator (PICA)

机译:酚醛浸渍碳烧蚀剂(PICA)热解过程中物种产生的定量测定

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Experiments to quantitatively determine detailed species production from the pyrolysis of Phenolic Impregnated Carbon Ablator (PICA) were performed using a reactor assembly adapted from a previous study on phenol-formaldehyde resin decomposition. A step-wise heating procedure that used a 50 K increment from room temperature up to 1250 K was employed for the experiments. The mass loss was measured after each 50 K step for PICA samples with an initial mass of 100 mg. Species production from the pyrolysis process was quantified using state-of-the-art gas-chromatography techniques. Compared to the more traditional mass spectroscopy techniques, gas chromatography allows to measure all species, from hydrogen to large aromatics. The quantitative molar production of species versus temperature is reported in this work. The species product from PICA pyrolysis are quite different from the species obtained in a previous study on a resole type phenolic resin pyrolysis. This suggests that characterizations need to be carried out for all variations of phenolic-matrix based ablators.
机译:使用反应器组件进行了实验,以定量确定从酚醛浸渍碳烧蚀剂(PICA)的热解中产生的详细物种,该反应器组件是根据先前对苯酚-甲醛树脂分解的研究改编而来的。实验采用了从室温到1250 K的增量为50 K的逐步加热程序。对于初始质量为100 mg的PICA样品,在每50 K步骤之后测量质量损失。使用最新的气相色谱技术对热解过程中产生的物种进行定量。与更传统的质谱技术相比,气相色谱仪可以测量从氢到大型芳烃的所有种类。这项工作报道了物种相对于温度的定量摩尔产量。 PICA热解的物种产物与先前对甲阶酚醛树脂热解的研究中获得的物种完全不同。这表明需要对所有基于酚醛基质的烧蚀器进行表征。

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