Abstract
Based on the HTPB/IPDI propellant formulation system, the compatibility of three solidifiable catalysts TPB, TEPB and TS-01 with the main component of the propellant, their respective morphological characteristics and rheological properties of the propellant slurry were analyzed by differential scanning calorimetry (DSC), scanning electron microscopy (SEM) and ARES rheometer. Combined with the curing catalytic mechanism, the influence of three curing catalysts on HTPB propellant process and mechanical properties were studied. The result show that the three curing catalysts have good compatibility with the main propellant component. TEPB and TS-01 have higher catalytic activity than TPB, which can accelerate the curing reaction process of propellant system and shorten the curing cycle of propellant. After adding TS-01, the properties of propellant were not much different from those of TPB-containing systems, and the tensile strength of propellant increased by about 0.1 MPa compared with TPB-containing propellant under the same curing conditions. Mechanical properties of TS-01-containing propellant were maintained at virtually a similar level at activity conditions of 50°C, 4 days and 40°C for 5 days as TPB-containing propellant at activity conditions of 60°C, 8 days and 50°C for 10 days.
