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三硝基甲苯起爆机理实验研究 被引量:1

SINGLE PULSE SHOCK TUBE STUDY ON DECOMPOSITION AND INCIPIENT DETONATION OF THE TRINITROTOLUENE
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摘要 用单脉冲化学激波管实验方法,使用自由基清扫剂和对比速率,测定了邻位和对位硝基甲苯在高温下,裂解瞬间(500μs) 的化学反应机理,并测定了化学反应速率常数。作为邻位硝基甲苯的同分异构体,对位硝基甲苯的主要裂解通道与其不同。通过实验发现了邻位硝基甲苯的裂解重要通道,测到它的产1 氧2 氮3 ,4环丁二稀基异嚙唑( Anthranil) 在瞬间随温度变化生成和很快消失的过程。由此,测得这一化学性质极不稳定的产物的消失速率常数为:k ( Anthranil) = 3 .7 ×1015·exp( - 25800 T)(s - 1) 。分析这一过程的机理,认为第一步是硝基甲苯的裂解,第二步是 Anthranil 的生成,第三步是 Anthranil 中的 N- O 键的断裂。 Dilute quantities of o nitrotoluene and anthranil have been pyrolyzed in comparative rate single pulse shock tube experiments.Rather a lot of C—NO 2 bond cleavage than NO 2 isomerization are found as major channels in p nitrotoluene decomposition.We demonstrate that the important pathway for pyrolysis involves the formation of anthranil with the following overall rate expression: k(o nitrotoluene→anthranil) =1.2×10 13 · exp (-26020/T)· s -1 The anthranil that is formed is very unstable under our conditions,the rate expression for disappearance has been found to be the following: k( anthranil) d=3.7×10 15 ·exp (-25800/T)· s -1
出处 《高压物理学报》 EI CAS CSCD 北大核心 1999年第3期184-186,共3页 Chinese Journal of High Pressure Physics
关键词 激波管 三硝基甲苯 起爆机理 实验 shock tube,trinitrotoluene,incipient detonation.
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