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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Effect of deuteration on the diameter-effect curve of liquid nitromethane
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Effect of deuteration on the diameter-effect curve of liquid nitromethane

机译：氘化对液态硝基甲烷直径-效应曲线的影响

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摘要

The detonation properties of liquid nitromethane [CH3NO2] are probably the most thoroughly studied of any condensed-phase explosive. Because it is homogeneous (i.e., lacks hot-spot phenomena), it provides a window into the underlying chemical processes induced by a passing shock or detonation wave-such information is submerged in the complex fluid mechanics when heterogeneous explosives are detonated. In this paper, we provide experimental data and data analysis of the effect that deuterating nitromethane's methyl group has on some aspects of the processes that occur in the detonating liquid material. In the experimental part of this study, we report diameter-effect curves (i. e., inverse charge internal radius vs steady detonation speed) for pure CH3NO2 and pure CD3NO2 confined in right-circular cylinders of C-260 brass. Large differences in the infinite-medium (i. e., plane wave) detonation speed and in the failure diameter of the two materials are observed. Interpretations of the observations based on physical and chemical theory are given. The observed large decrease in deuterated nitromethane's infinite-medium detonation speed, relative to the protonated material, is interpreted in terms of the Zeldovitch, von Neumann, and Doering theory of steady-state detonation. We also estimate the relative size of the steady plane-wave reaction-zone length of the two materials. We interpret the observed increases in NM's failure diameter and its steady one-dimensional chemical-reaction-zone length due to deuteration in terms of the quantity of NM aci ion present. The new results are placed in the context of earlier work on detonating liquid nitromethane.
机译：液态硝基甲烷[CH3NO2]的爆轰特性可能是任何凝聚相炸药中最详尽的研究。因为它是均质的（即没有热点现象），所以它为通行的冲击波或爆轰波引起的潜在化学过程提供了一个窗口-当异质炸药爆炸时，此类信息就会淹没在复杂的流体力学中。在本文中，我们提供了实验数据和数据分析，说明了氘代硝基甲烷的甲基对引爆液体材料中某些过程的影响。在本研究的实验部分中，我们报告了受限于C-260黄铜的直圆圆柱体中的纯CH3NO2和纯CD3NO2的直径效应曲线（即，反向装药内半径与稳定爆轰速度的关系）。观察到无限大（即平面波）爆震速度和两种材料的破坏直径的较大差异。给出了基于物理和化学理论的观测结果的解释。相对于质子化物质，氘化的硝基甲烷无限中等爆轰速度的大幅降低是根据Zeldovitch，von Neumann和Doering稳态爆轰理论来解释的。我们还估计了两种材料的稳定平面波反应区长度的相对大小。我们用存在的NM酸的量解释了由于氘化导致的NM失效直径及其稳定的一维化学反应区长度的增加。新的结果被放在早期引爆液态硝基甲烷的工作中。

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