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- W4281263662 abstract "High melting point paraffin wax (HPW) is a novel desensitizer that has the potential to achieve low sensitivity of energetic crystals, such as 1,3,5,7-tetranitro-1,3,5,7-tetrazocane (HMX). However, first-principles calculations confirmed that interface deterioration occurred due to a weak interfacial connection. In this work, the polydopamine (PDA)/HPW/PDA with a sandwich-like interfacial structure was prepared using three simple steps to improve safety performance, thermal stability, and mechanical properties. The theoretical and experimental results suggested that the PDA acted as a double-sided tape to adhere to the adjacent HMX/HPW layer or HPW/polymer binder layer, thus substantially enhancing the interfacial interaction. While maintaining higher safety performance (impact energy: 11∼13 J) than that of HMX (5 J), the new design improved the β - δ polymorphic transition temperature of HMX to 219.4 °C for HMX@PDA@HPW@PDA, which was higher than that of HMX@HPW (202.8 °C) and core@double-shell HMX@PDA@HPW (208.9 °C). Among the modified energetic composites, polymer-bonded explosives (PBXs) based on HMX@PDA@HPW@PDA exhibited the optimum mechanical performance, including the storage modulus and tensile fracture energy, which were 43.5% and 77.1% higher than those of PBXs based on raw HMX, respectively. The achieved favorable systematical enhancement in thermal stability, mechanical properties, and safety performance shows that such a sandwich-like interfacial structure has great potential for application for HMX-based formulation used in complex environments. A sandwich-like, interfacial-structured polydopamine/high-melting-point paraffin wax/polydopamine (PDA/HPW/PDA) was constructed on the surface of 1,3,5,7-tetranitro-1,3,5,7-tetrazocane (HMX) to enhance the safety performance, thermal stability, and mechanical properties of polymer-based energetic composites." @default.
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- W4281263662 date "2022-12-01" @default.
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- W4281263662 title "Sandwich-like interfacial structured polydopamine (PDA)/Wax/PDA: A novel design for simultaneously improving the safety and mechanical properties of highly explosive-filled polymer composites" @default.
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- W4281263662 doi "https://doi.org/10.1016/j.enmf.2022.03.003" @default.
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