The dynamic mechanical properties of composite solid propellants with and without a bonding agent were studied as a function of temperature. The bonding efficiency of bonding agents in two kinds of composite solid propellants was evaluated by establishing a mesophase or interphase model and introducing a characterization factor, A. The result is that: the lower the value of A, the smaller the A value changing with temperature, the higher the bonding efficiency during this temperature range. This investigation provides a new method for the characterization of bonding efficiency of bonding agents in composite solid propellants.
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