Premium
The energy and pressure exponent of composite modified double‐base propellant
Author(s) -
Zhulin Hou,
Zengguo Feng,
Enpu Wang,
Panming Han
Publication year - 1992
Publication title -
propellants, explosives, pyrotechnics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.56
H-Index - 65
eISSN - 1521-4087
pISSN - 0721-3115
DOI - 10.1002/prep.19920170203
Subject(s) - propellant , exponent , composite number , base (topology) , materials science , copper , thermodynamics , analytical chemistry (journal) , composite material , chemistry , organic chemistry , metallurgy , physics , mathematics , mathematical analysis , philosophy , linguistics
The paper describes an analysis on the energy and pressure exponents of composite modified double‐base (CMDB) propellants. The evaluation of the energy was conducted by means of a thermodynami‐ cal program. Propellant burning rates were determined by the strand burner method. In the AP‐based composition, the energy is enhanced and the pressure exponent reduced with increasing AP content. When AP is partially or entirely replaced by the nitramines HMX or RDX, Isp is improved, and the pressure exponent is inevitably increased. A mixture of lead salicylate or lead o‐amino benzoate and copper 2,4‐ or 3,5‐dihydroxy benzoate produces a remarkable effect on the burning nature of the CMDB propellant. It was noted that the pressure exponent decreases from 0.66 to 0.48 with lead and copper salts added at 3.0% in AP‐Al, 0.82 to 0.60 at 2.0% in RDX‐Al and 0.72 to 0.54 at 2.5% in RDX‐AP‐Al compositions, respectively.