HTPE/PCL四组元推进剂药浆的流变性能

To study the rheological behaviors after introducing poly ε-caprolactone (PCL) to the propellant formulation, the rheometer was used to compare the rheological properties of HTPE and HTPE/PCL four-component propellant slurries under different temperatures and shear rates, and the process parameters were optimized. The results show that the shear stress and shear rate of HTPE and HTPE/PCL propellant slurries increase exponentially, and their apparent viscosities present pseudoplastic fluid with shear thinning. Increasing temperature can reduce the shear stress, apparent viscosity and viscosity coefficient, while increase the shear rate index. The flow activation energy of HTPE/PCL propellant slurry is 3.90×10⁴kJ/mol, which is a bit higher than that of HTPE (2.75×10⁴kJ/mol). The introduction of PCL has no significant effect on the process performance of HTPE/PCL propellant slurry, the best process temperature is 50-60℃, and the pot life is 270-329min.