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Thermal decomposition of fluorinated polymers used in plasticized explosives and munitions
Propellants, Explosives, Pyrotechnics ( IF 1.7 ) Pub Date : 2023-11-15 , DOI: 10.1002/prep.202300207 Athina Kominia 1 , James L. Smith 1 , Pamela Sheehan 2 , Jimmie C. Oxley 1
Propellants, Explosives, Pyrotechnics ( IF 1.7 ) Pub Date : 2023-11-15 , DOI: 10.1002/prep.202300207 Athina Kominia 1 , James L. Smith 1 , Pamela Sheehan 2 , Jimmie C. Oxley 1
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A number of military explosives and munitions employ fluorinated polymers as binders or components, e. g., PBXN-5. To determine potential environmental releases during disposal operations, the thermal decomposition of the fluorinated polymers Viton A, Kel-F, and Teflon were examined alone and in combination with the explosive HMX. Although PBXN-5 only contains 5 % by weight Viton A, laboratory prepared analogs were made with 5 % polymer as well as with 50 % polymer to ensure polymer decomposition products could be detected. Under air and under nitrogen decomposition was examined by SDT [simultaneous differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA)], TGA-infrared (IR) spectrometry, and pyrolysis gas chromatography with mass spectrometric analysis (GC-MS). All three techniques, SDT, TGA-IR, and pyrolysis GC-MS, suggest that decomposition of HMX could be completed at low temperature before polymer decomposition ensues. To confirm this observation, pyrolysis GC-MS was performed at temperatures below 350 °C since above this temperature all three polymers exhibited some fluorinated decomposition products.
中文翻译：
用于增塑炸药和弹药的氟化聚合物的热分解
许多军用炸药和弹药采用氟化聚合物作为粘合剂或成分，例如。例如，PBXN-5。为了确定处置操作期间潜在的环境释放，单独和与爆炸性 HMX 结合检查氟化聚合物 Viton A、Kel-F 和 Teflon 的热分解。虽然 PBXN-5 仅含有 5%（按重量计）Viton A，但实验室制备的类似物是用 5% 聚合物以及 50% 聚合物制成的，以确保可以检测到聚合物分解产物。通过 SDT [同时差示扫描量热法 (DSC) 和热重分析 (TGA)]、TGA 红外 (IR) 光谱法和热解气相色谱质谱分析法 (GC-MS) 检查空气和氮气下的分解情况。SDT、TGA-IR 和热解 GC-MS 这三种技术都表明 HMX 的分解可以在聚合物分解发生之前在低温下完成。为了证实这一观察结果，在低于 350 °C 的温度下进行热解 GC-MS，因为高于该温度，所有三种聚合物都表现出一些氟化分解产物。
更新日期：2023-11-15
中文翻译：
用于增塑炸药和弹药的氟化聚合物的热分解
许多军用炸药和弹药采用氟化聚合物作为粘合剂或成分，例如。例如，PBXN-5。为了确定处置操作期间潜在的环境释放，单独和与爆炸性 HMX 结合检查氟化聚合物 Viton A、Kel-F 和 Teflon 的热分解。虽然 PBXN-5 仅含有 5%（按重量计）Viton A，但实验室制备的类似物是用 5% 聚合物以及 50% 聚合物制成的，以确保可以检测到聚合物分解产物。通过 SDT [同时差示扫描量热法 (DSC) 和热重分析 (TGA)]、TGA 红外 (IR) 光谱法和热解气相色谱质谱分析法 (GC-MS) 检查空气和氮气下的分解情况。SDT、TGA-IR 和热解 GC-MS 这三种技术都表明 HMX 的分解可以在聚合物分解发生之前在低温下完成。为了证实这一观察结果，在低于 350 °C 的温度下进行热解 GC-MS，因为高于该温度，所有三种聚合物都表现出一些氟化分解产物。
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