Shock-induced chemical reactions in simple organic molecules

Dattelbaum, Dana M.; Sheffield, S. A.

doi:10.1063/1.3686357

Cited by 7 publications

(3 citation statements)

References 11 publications

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“…Older diagnostics provided mean wave speeds based on times of arrival, whereas profiles capture their full temporal evolution including reshock, release, and wave splitting. The last is particularly helpful for identifying shock-driven chemistry, and dramatic multiwave structures have been observed in conjunction with decomposition of organic liquids [99].…”

Section: Resultsmentioning

confidence: 99%

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Shock-Driven Decomposition of Polymers and Polymeric Foams

Dattelbaum

Coe

2019

Polymers

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Polymers and foams are pervasive in everyday life, as well as in specialized contexts such as space exploration, industry, and defense. They are frequently subject to shock loading in the latter cases, and will chemically decompose to small molecule gases and carbon (soot) under loads of sufficient strength. We review a body of work—most of it performed at Los Alamos National Laboratory—on polymers and foams under extreme conditions. To provide some context, we begin with a brief review of basic concepts in shockwave physics, including features particular to transitions (chemical reaction or phase transition) entailing an abrupt reduction in volume. We then discuss chemical formulations and synthesis, as well as experimental platforms used to interrogate polymers under shock loading. A high-level summary of equations of state for polymers and their decomposition products is provided, and their application illustrated. We then present results including temperatures and product compositions, thresholds for reaction, wave profiles, and some peculiarities of traditional modeling approaches. We close with some thoughts regarding future work.

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Section: Resultsmentioning

confidence: 99%

“…It was only recently that we reported the first observation of multiwave structure due to chemical reaction in a polymer, although with structure much less dramatic than that shown in Ref. [99]. Transmission experiments at shock stresses of approximately 30 to 50 GPa were performed on CP and CE, using the configuration of Figure 7B.…”

Section: Resultsmentioning

confidence: 99%

Shock-Driven Decomposition of Polymers and Polymeric Foams

Dattelbaum

Coe

2019

Polymers

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“…The optimal diagnostic for this type of experiment would be some form of embedded diagnostic that measures the pressure state of Epon directly, while simulta-neously not interfering with the dynamics of wave propagation in the target. While embedded magnetic gauges have been used previously at LANL to measure the shock and unloading characteristics of explosives and other materials, [3][4][5] these diagnostics are not currently available for use on the Ancho Canyon two-stage gun. The primary diagnostic at the Ancho Canyon gun facility is optical velocimetry, where both VISAR [6] and PDV [7] are regularly fielded.…”

Section: Methodsmentioning

confidence: 99%

(U) Design Considerations for Obtaining Deep Release in Reacted Epon 828

Fredenburg

Lang

Dattelbaum

et al. 2016

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This document summarizes results from one-dimensional calculations performed to investigate the release behavior of reacted Epon 828. Two design goals were set, (1) the product phase had to be achieved upon the initial shock loading, and (2) a deep release state could be achieved. Both transmission and front surface impact geometry were investigated. The two design criteria were met with the front surface impact design employing a modified projectile.

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