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Preparation and Reactivity of Gasless Nanostructured Energetic Materials

Preparation and Reactivity of Gasless Nanostructured Energetic Materials

Published on: April 2, 2015

PETN ignition experiments and models.

Michael L Hobbs¹, William B Wente, Michael J Kaneshige

¹Engineering Sciences Center, Nanoscale and Reactive Processes Department, Sandia National Laboratories, Albuquerque, New Mexico 87105, USA. mlhobbs@sandia.gov

The Journal of Physical Chemistry. A

|April 6, 2010

Summary

This summary is machine-generated.

A new ignition model for pentaerythritol tetranitrate (PETN) predicts ignition behavior using experimental data. Cookoff violence in PETN is linked to the reaction extent at ignition onset.

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Area of Science:

Chemical Engineering
Materials Science
Thermodynamics

Background:

Pentaerythritol tetranitrate (PETN) is a sensitive explosive requiring accurate ignition modeling.
Understanding PETN ignition is crucial for safety and performance in energetic material applications.

Purpose of the Study:

To develop a simplified ignition model for PETN.
To correlate cookoff violence with the extent of reaction at ignition onset.

Main Methods:

Utilized data from differential thermal analysis, thermogravimetric analysis, differential scanning calorimetry, beaker tests, and time to explosion tests.
Developed a one-step, first-order, pressure-independent kinetic mechanism.
Assessed PETN degradation state at ignition using experimental and modeling data.

Main Results:

A simple, predictive ignition model for PETN was successfully developed.
The model accurately predicts pressure, temperature, and time to ignition.
Cookoff violence was correlated with the extent of reaction at ignition onset, validated by metal deformation and post-ignition imagery.

Conclusions:

The developed model provides a valuable tool for understanding PETN ignition behavior.
The correlation between reaction extent and cookoff violence offers insights into explosive behavior.
Further research can refine the model and its application to various PETN formulations and conditions.