Preparation and characterization of TA surface modified HMX/F2602 composites

Abstract

AbstractEnhancing the safety performance of conventional polymer‐bonded explosives (PBX) has been a hot topic of research in the field of energy‐containing materials. For this purpose, this paper proposes a green and simple method to apply tannic acid (TA) to PBX by in situ polymerization. A two‐layer core‐shell composite with HMX as the core, TA as the inner shell, and fluoroelastomer F2602 as the outer shell was designed without changing the total binder content. The composites were analyzed by various tests and the goal of improving safety and mechanical strength was accomplished in the prepared TA‐modified PBX. Compared with the raw material HMX, the β‐δ phase transition temperature of PBX with double‐layer core‐shell structure is increased by 15.3 °C. In addition, the combination of TA coating and fluoropolymer allows the PBX to reduce impact and friction sensitivity. It also has excellent performance in enhancing the mechanical performance of PBX. The simplicity and scalability of the described method provide new ideas for the design and fabrication of high‐energy composites with higher safety and mechanical properties.