Decomposition of Phenolic Impregnated Carbon Ablator (PICA) as a Function of Temperature and Heating Rate
| Autor: | Timothy K. Minton, Brody K. Bessire |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Chemistry
Analytical chemistry chemistry.chemical_element 02 engineering and technology Cresol Atmospheric temperature range 010402 general chemistry 021001 nanoscience & nanotechnology Mass spectrometry 01 natural sciences Decomposition 0104 chemical sciences chemistry.chemical_compound Yield (chemistry) medicine Organic chemistry Phenol General Materials Science 0210 nano-technology Carbon Pyrolysis medicine.drug |
| Zdroj: | ACS applied materialsinterfaces. 9(25) |
| ISSN: | 1944-8252 |
| Popis: | Material response models for phenolic-based thermal protection systems (TPSs) for atmospheric entry are limited by the lack of knowledge of the nonequilibrium processes that may govern the decomposition pathways of phenolic resin at heating rates up to tens of degrees Celsius per second. We have investigated the pyrolysis of phenolic impregnated carbon ablator (PICA) by measuring the molar yields of the volatile decomposition products as a function of temperature at four nominal heating rates of 3.1, 6.1, 12.7, and 25 °C s–1, over the temperature range of 100–1200 °C. A mass spectrometer was used to probe the 14 significant gaseous products directly as PICA samples were heated resistively in vacuum. Four products, H2, CH4, H2O, and CO, overwhelmingly dominated the molar yields. However, in terms of mass yield, phenol and its methylated derivatives, cresol and dimethyl phenol, were significant. The temperature-dependent molar yields of the observed products exhibited a marked dependence on heating rate. Th... |
| Databáze: | OpenAIRE |
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