Constant-volume
combustion energy of the lead salts of 2HDNPPb and 4HDNPPb and their effect
on combustion characteristics of RDX–CMDB propellant |
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| Authors: | Z Fengqi G Hongxu L Yang H Rongzu C Pei G Sheng-li Y Xu-wu S Qizhen |
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| Institution: | (1) Xi’an Modern Chemistry Research Institute, Xi’an, Shaanxi, China, 710065;(2) Shaanxi Key Laboratory of Physico-Inorganic Chemistry, Department of Chemistry, Northwest University, Xi’an, Shaanxi, China, 710069 |
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| Abstract: | The constant-volume combustion energies of
the lead salts of 2-hydroxy-3,5-dinitropyridine (2HDNPPb) and 4-hydroxy-3,5-dinitropyridine
(4HDNPPb), ΔU
c
(2HDNPPb(s) and 4HDNPP(s)),
were determined as –4441.92±2.43 and –4515.74±1.92
kJ mol–1 , respectively, at 298.15 K. Their
standard enthalpies of combustion, Δc
m
H θ(2HDNPPb(s) and 4HDNPPb(s), 298.15 K), and standard enthalpies of formation,
Δr
m H θ(2HDNPPb(s) and 4HDNPPb(s),
298.15 K) were as –4425.81±2.43, –4499.63±1.92 kJ
mol–1 and –870.43±2.76, –796.65±2.32
kJ mol–1 , respectively. As two combustion
catalysts, 2HDNPPb and 4HDNPPb can enhance the burning rate and reduce the
pressure exponent of RDX–CMDB propellant. |
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| Keywords: | combustion energy lead salt of 2-hydroxy-3 5-dinitropyridine lead salt of 4-hydroxy-3 5-dinitropyridine standard enthalpy of formation |
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