聚對苯二甲酸二乙酯燃燒干擾產物對縱火劑鑑析干擾之研究

A Study of Interference of Poly(ethylene terephthalate) Fire Debris Products in Identifying Accelerants

蕭妃專(Fei Chuan Hsiao)

指導教授 ： 王賢達

國立臺北科技大學/工程學院/有機高分子研究所/碩士(2005年)

摘要

石化系塑膠製品在火災現場高溫燃燒產生大量之烷類、芳香族類等化合物常導致火場可燃性液體殘跡鑑定之干擾，本研究以4種不同PET原料為研究對象，以靜態頂空濃縮、氣相層析/質譜儀(GC/MS)、熱裂解/氣相層析/質譜儀(PY/GC/MS)， 分別將PET燃燒與添加縱火劑燃燒，探討其燃燒干擾產物對縱火劑鑑定之干擾。實驗結果顯示：不同種類PET粒燃燒殘跡萃取液均可檢出toluene、ethylbenzene、m-xylene、styrene、1-ethyl-2-methyl-benzene、biphenyl等成分，由其檢出產物多為芳香族類化合物，依ASTM E 1618-01規定，可被視為芳香族類液體干擾產物；防火級的PET其燃燒殘跡萃取液可檢出大量高沸點之含溴芳香族類及少量MPD與HPD標的化合物，含溴芳香族類化合物為燃燒過程中難燃劑之熱裂解產物。PET粒添加縱火劑燃燒或燃燒時間為2分鐘，均會使殘跡萃取液之干擾產物明顯減少。PET添加足量縱火劑燃燒殘跡萃取液之GC/MS圖譜，可區別縱火劑和干擾產物信號；但當所加縱火劑量微時，是無法區別上述二種信號。

關鍵字

縱火劑 ； 聚對苯二甲酸二乙酯 ； 氣相層析/質譜儀 ； 熱裂解 ； 燃燒殘跡

並列摘要

Petroleum-based plastic products could be pyrolyzed into alkanes and aromatics causing difficulty in search for ignitable liquid in fire debris. This study applied passive headspace concentration and GC/MS methods to get information from fire debris produced from four brands of poly(ethylene terephthalate)’s (PET) and from above polymers blended with different amount of gasoline, toluene and octane .The results indicate that toluene、ethylbenzene、m-xylene、styrene、1-ethyl-2-methyl-benzene and biphenyl are the major products of extracts from PET fire debris and a suffient quality of ignitable liquid in corporated into PET would suppress the signals in chromatograms given by above PET fire debris extracts. Besides, bromo-aromatics were detected with enough portion from fire debris extracts of fire-protected PET and were created during the ignition process.

並列關鍵字

accelerant, ； poly(ethylene terephthalate) ； GC/MS ； pyrolysis ； fire debris

參考文獻

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