To study the mechanical properties of highly filled hydroxy-terminated polybutadiene (HTPB) propellant with 90 wt% solid fillers, stress–strain curves under different temperatures (−50 to 70 °C) and strain rates (0.000476 0.119048 s−1) were obtained by uniaxial tensile test. Moreover, obtain glass transition temperature understand effect low on propellant, DMA experiments carried out. On this b...