In order to eliminate residual solvents in ammunition and to reduce the emissions of volatile organic compounds to the atmosphere, the U.S. Army ARDEC has teamed with TNO in developing a new process for the production of solventless propellant for tank ammunition. To reduce the costs of solventless propellants production, shear roll mill and continuous extrusion processing was investigated. As described in this paper JA-2 a double base propellant cannot be processed without solvent by the extrusion process. An alternative JA-2 equivalent propellant was defined. The aim of this work is to demonstrate the manufacturing of this propellant by solventless continuous twin screw extrusion processing while maintaining gun performance characteristics of conventional JA-2 propellant. This is elucidated by explicitly researching the relationship between interior ballistic properties of the gun propellant and utilizing a continuous manufacturing process. Processing conditions were established, and the propellant was manufactured accordingly. The extruded propellant has the desired properties, which resulted in a comparable gun performance as the conventional JA-2 propellant.
Definition of a JA-2 Equivalent Propellant to be Produced by Continuous Solventless Extrusion
Manuscript received July 1, 2012; final manuscript received October 23, 2012; accepted manuscript posted January 7, 2013; published online April 19, 2013. Assoc. Editor: Bo S. G. Janzon. This material is declared a work of the US Government and is not subject to copyright protection in the United States. Approved for public release; distribution is unlimited.
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Manning, T. G., Leone, J., Zebregs, M., Ramlal, D. R., and van Driel, C. A. (April 19, 2013). "Definition of a JA-2 Equivalent Propellant to be Produced by Continuous Solventless Extrusion." ASME. J. Appl. Mech. May 2013; 80(3): 031405. https://doi.org/10.1115/1.4023315
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