Study on the Formulation of Low Burning Rate HTPB Propellant with RDX

The formulation with solid content of 87.5% for low burning rate HTPB propellant with RDX was prepared to satisfy the SRM requirement.The effects of dosage of RDX and modified ammonium oxalate(CA)on the thermodynamic parameters were studied by the minimum free energy method via theoretical calculation.The BSFΦ165 SRM test were carried out to test the burning rate and specific impulse.The results show that the thermodynamic parameters can be affected by changing the dosage of RDX and modified ammonium oxalate for the low burning rate HTPB propellant with RDX,when the mass ratio of RDX and CA are 10% and 2.0%,respectively,the specific impulse is 2374N·s·kg-1,specific impulse efficiency is 0.919,burning rate is 4.12mm·s-1.The requests of low burning rate can be satisfied by adding modified ammonium oxalate and changing particle gradation of AP when the energy of the formulation invariable.