ADN PROPELLANT PDF

ADN - The new oxidizer around the corner for an environmentally friendly smokeless propellant. ISSN The search for a smokeless propellant has encouraged scientists and engineers to look for a chlorine-free oxidizer as a substitute for AP ammonium perchlorate. Endeavors seemed to come to an end when ADN ammonium dinitramide appeared in the West in the early s. Although some drawbacks soon became apparent by that time, the foremost obstacle for its use in rocket-motors came from the patent originally applied for in the United States in

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ADN - The new oxidizer around the corner for an environmentally friendly smokeless propellant. ISSN The search for a smokeless propellant has encouraged scientists and engineers to look for a chlorine-free oxidizer as a substitute for AP ammonium perchlorate. Endeavors seemed to come to an end when ADN ammonium dinitramide appeared in the West in the early s.

Although some drawbacks soon became apparent by that time, the foremost obstacle for its use in rocket-motors came from the patent originally applied for in the United States in Furthermore, environmental concerns have also increased during these two decades. Ammonium perchlorate is believed to cause thyroid cancer by contaminating soil and water. In addition, AP produces hydrogen chloride during burning which can cause acid rain and ozone layer depletion.

Since then, much progress has been made in its development in synthesis, re-shaping, microencapsulation and solid propellant. The high solubility of ADN in water has also allowed its application as liquid monopropellant. Tests have revealed Isp specific impulse superior to that normally observed with hydrazine, one of the most harmful and hazardous liquid propellants.

With constraints of use, along with the patent near to expiry, scientists and engineers are rushing to complete developments and patents until then. Services on Demand Journal. How to cite this article.

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Characteristics of NEPE Propellant with Ammonium Dinitramide (ADN)

Ammonium dinitramide ADN is the ammonium salt of dinitraminic acid. ADN decomposes under heat to leave only nitrogen, oxygen, and water. It makes an excellent solid rocket oxidizer with a slightly higher specific impulse than ammonium perchlorate and more importantly, does not leave hydrogen chloride fumes. This property is also of military interest because halogen free smoke is harder to detect. It decomposes into low molecular mass gases so it contributes to higher performance without creating excessive temperatures if used in gun or rocket propellants. The salt is prone to detonation under high temperatures and shock more so than the perchlorate. Additionally, hydrazine is highly toxic and carcinogenic, while LMPS is only moderately toxic.

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International Journal of Energetic Materials and Chemical Propulsion

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