Two types of bonding agents were synthesized based on polyetheramines (PEAs), which aim to increase the strain of AP/CL‐20/GAP formulation. The PEAs, terminated with cyano (CTPEA) and Schiff base (SBPEA) groups, were applied in the AP/CL‐20/GAP formulation, respectively. The results showed that the bonding agents TCN‐403 (CTPEA) and TBA‐403 (SBPEA), which were prepared from trifunctional PEA named as T‐403, could significantly increase the maximum elongation ratio of the formulation. The differences between the TCN‐403 and TBA‐403 were analyzed by DMA of the formulations, SEM of the coated fillers, and in‐situ tensile test, indicating that the Schiff base bonding agents can effectively inhibit the dewetting of the binder from the solid particles in the formulations.

In this study, various polymer materials, such as polystyrene (PS), polymethyl acrylate (PMA), and polyvinyl pyrrolidone (PVP), are successfully encapsulated on the surface of Alpha-Aluminum hydride (α-AlH3) by the in-situ...

Alpha-aluminum hydride (α-AlH 3 ) is an ideal energetic combustion agent, but its poor stability and safety limit its application. Therefore, we prepare different composites by using the solvent/anti-solvent method to coat different pyrotechnic binders on the surface of α-AlH 3 . The vacuum stability test show that the minimum outgassing of Shellac-coated α-AlH 3 composite is only 1.2 mL/g at 50 °C for 6 days. Due to the good electrical insulation properties of Viton, Viton-coated α-AlH 3 composite have the highest E 50 value of electrostatic sensitivity. In addition, the pyrotechnic binders coating not only protects the activity of the α-AlH 3 but also effectively increases its burning rate. Viton-coated α-AlH 3 composite have more gaseous products and maximum flame area during combustion. This study illustrates that α-AlH 3 coated with pyrotechnic binders is a means to address its stability and safety, laying the foundation for its application in solid propellants.

The NPBA-2-based composite solid propellant exhibited improved mechanical strength and glass transition due to the strong interactions between epoxy groups and HMX or RDX.