Research on the application of lead copper catalysts in low aluminum HTPE propellants

DOI:	10.11809/bqzbgcxb2023.09.015
Keywords:	low aluminum HTPE propellant; thermal decomposition; burning rate; pressure index;process performance; mechanical property
Abstract:	The effects of lead citrate (PbCi) and 2, 4 dihydroxy Copper benzoate (β Cu) as well as their complexes with carbon black (CB) on the main components and combustion, process, and mechanical properties of low aluminum HTPE propellants are studied. The results indicate that PbCi, β Cu show different catalytic effects on the burning rate of low aluminum HTPE propellant.PbCi has little effect on the burning rate at 5~11 MPa, but can increase the burning rate at 11~19 MPa.β Cu can effectively increase the burning rate at 5~19 MPa.The composite catalyst PbCi/CB has an inhibitory effect on the ignition rate at propellant 9~19 MPa, and the effect of the composite catalyst β Cu/CB on the ignition rate is comparable to that of the same content of β Cu.PbCi, β Cu and their composite catalysts with CB can reduce the pressure index of 5~11 MPa and increase the pressure index of 11~19 MPa.The process properties of low alumina HTPE propellant slurry are not affected by PbCi, β Cu and their CB composite catalysts; PbCi effectively improves the elongation of low alumina HTPE at -40 ℃; and β Cu causes a significant reduction in tensile strength and elongation of the propellant at 20 ℃ and 50 ℃.
Published:	2023-09-28
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