Effect of Binder Content on the Non-linear Creep Properties of Polymer Bonded Explosives

The non-linear creep behavior of 1,3,5-triamino-2,4,6-trinitrobenzene (TATB)-based polymer bonded explosives (PBXs) with different binder content has been measured under different stresses and temperatures. Reduced creep strain and steady-state creep strain rate and prolonged creep failure time were observed with decreasing binder content, suggesting enhanced creep resistance performance. Subsequently, the effects of applied stress and temperature on the creep resistance were also explored. The proposed model, based on Maxwell and two Kelvin units, was proved to describe the three-point bending creep behaviors for TATB-based PBXs tested. In addition, the relations of the binder content and the mechanical response were investigated by compressive tests and dynamic mechanical analysis.