1. The nitroguanidine is added to the propellant during its mixing phase.

2. The thermal decomposition of single, double-and triple-base nitroguanidine propellants was studied by differential scanning calorimetry (DSC).

3. The dynamic viscoelastic properties of the nitramine and nitroguanidine propellants in the aging process were studied in this work.

4. The thermal decompositiondouble - and triple - base nitroguanidine propellants was studied by differential scanning calorimetry ( DSC ).

5. The results show that irradiation of the poor uranium alloy had no remarkable influence on the burning properties of three-combination nitroguanidine propellant.