Experimental Study of Pyrolysis and Laser Ignition of Low-Vulnerability Propellants Based on RDX

Autor: Barbara Baschung, Philippe Gillard, Léo Courty, Jordan Ehrhardt
Přispěvatelé: Laboratoire pluridisciplinaire de recherche en ingénierie des systèmes, mécanique et énergétique (PRISME), Université d'Orléans (UO)-Institut National des Sciences Appliquées - Centre Val de Loire (INSA CVL), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA), Institut franco-allemand de recherches de Saint-Louis (ISL), DGA-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Courty, Léo, DGA-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
Jazyk: angličtina
Rok vydání: 2020
Předmět:
[CHIM.POLY] Chemical Sciences/Polymers
Materials science
animal structures
Laser ignition
Pharmaceutical Science
02 engineering and technology
macromolecular substances
Combustion
01 natural sciences
7. Clean energy
Chemical reaction
Article
Analytical Chemistry
law.invention
Internal ballistics
lcsh:QD241-441
ignition energy
combustion characteristics
lcsh:Organic chemistry
Explosive Agents
law
0103 physical sciences
Drug Discovery
low-vulnerability propellant
RDX
Physical and Theoretical Chemistry
Composite material
Propellant
010304 chemical physics
Triazines
[SPI.FLUID]Engineering Sciences [physics]/Reactive fluid environment
musculoskeletal
neural
and ocular physiology
Lasers
Organic Chemistry
technology
industry
and agriculture
Collodion
[SPI.FLUID] Engineering Sciences [physics]/Reactive fluid environment
021001 nanoscience & nanotechnology
pyrolysis
Decomposition
Ignition system
body regions
[CHIM.POLY]Chemical Sciences/Polymers
nitrocellulose
13. Climate action
Chemistry (miscellaneous)
Molecular Medicine
0210 nano-technology
Pyrolysis
Zdroj: Molecules
Molecules, MDPI, 2020, 25 (10), pp.2276. ⟨10.3390/molecules25102276⟩
Molecules, 2020, 25 (10), pp.2276. ⟨10.3390/molecules25102276⟩
Molecules, Vol 25, Iss 2276, p 2276 (2020)
Volume 25
Issue 10
ISSN: 1420-3049
DOI: 10.3390/molecules25102276⟩
Popis: Low-vulnerability propellants are propellants designed to resist unintended stimuli to increase safety during transport, storage and handling. The substitution of usual nitrocellulose-based gun propellants with these new materials allows maintaining interior ballistics performances while increasing the safety. In this paper, the pyrolysis, ignition and combustion of such propellants are investigated in order to study conditions leading to a safe and reproducible ignition. Low-vulnerability propellants studied are made of different ratios of hexogen (RDX) and nitrocellulose (NC). Three compositions are studied by varying weight percentages of RDX and NC: 95-5, 90-10 and 85-15 for respective weight percentages of RDX-NC. Pyrolysis of these propellants is studied with two different experimental setups: a flash pyrolysis device linked to a gas chromatograph coupled to a mass spectrometer (Py-GC-MS) and a closed-volume reactor coupled to a mass spectrometer. Different molecules, like NO2, CO, CH3COCH3 or CH2NCH2NCH2, are obtained during the decomposition of these propellants. Laser ignition of these propellants is studied in a cylindrical closed-volume reactor using a laser diode. Several combustion characteristics, such as ignition delays, maximal overpressures and combustion rates are given for the three propellants using the pressure signals. Moreover, ignition energies are also investigated. Obtained results are compared to the few available literature data. A particular behavior is noticed for the 90-10 propellant. The experimental data collected should serve in the future to have a better understanding of the chemical reactions driving the combustion process of these low-vulnerability propellants.
Databáze: OpenAIRE
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