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Science and Technology of Energetic Materials

Vol.64, No.1 (2003)

Research paper

Burning characteristics of AN based composite propellant using AN coated with polymer(*in Japanese)
Shuichi Terada, Makoto Kohga, and Yutaka Hagihara
p.9-15

Abstract

Ammonium nitrate(AN) particles were coated with polyvinyl acetate and ethyl cellulose in order to improve wetting between AN and binder. In this study, an attempt was made to prepare AN based propellant at higher AN content by the use of coated AN. Further, the burning characteristics of AN based composite propellant using coated AN were investigated. The upper limit content of AN contained in propellant can be increased by the use of the coated AN. However, the coating agent on the surface of AN particle causes to decrease a linear burning rate of the propellant. The decrease of the burning rate depends on the thickness of coating agent. Boron was added to the propellant containing coated AN in order to improve the burning rate and specific impulse. The linear burning rate at 7MPa and specific impulse of the propellant prepared at AN/B/HTPB=72.9/14.3/12.8 [mass%] are 5.2 mm·s-1 and 2460 Nskg-1, respectively. The burning rate and specific impulse can be increased by the addition of boron to AN based composite propellant.

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