Sensitivity of Solid Rocket Propellants for Card Gap Test

✍ Scribed by Eishu Kimura; Yoshio Oyumi

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 115 KB
• Volume: 24
• Category: Article
• ISSN: 0721-3115
• DOI: 10.1002/(sici)1521-4087(199904)24:2<90::aid-prep90>3.0.co;2-w

✦ Synopsis

Card gap test, which is standardized in Japan Explosives Society, was modi®ed in order to apply it to solid rocket propellants and carried out to evaluate sensitivities against shock stimuli. Solid propellants tested here were mainly azide polymer composite propellants, which contained ammonium nitrate (AN) as a main oxidizer. Double base propellant, composed nitroglycerin and nitrocellulose (NC), and ammonium perchlorate (AP)-based composite propellants were also evaluated in order to compare with the azide polymer propellants. It is found that the sensitivity was dominated by the oxidizer characteristics. AP-and AN-based propellant had less sensitivity and HMXbased propellant showed higher sensitivity, and the adding of NC and TMETN were contributed to worse sensitive for the card gap test. Good relationship was obtained between the card gap sensitivity and the oxygen balance of propellants tested here.