Abstract: In order to study the mechanical properties and ignition and reaction characteristics of the hafnium/tetrafluoroethylene-hexafluoropropylene-vinylidene fluoride copolymer (Hf/THV) reactive material, specimens with different Hf/THV ratios were prepared by solvent evaporation-hot pressing sintering, and quasi-static compression test and dynamic loading test based on the Split-Hopkinson pressure bar (SHPB) were carried out. The results showed that: Hf/THV broke instantaneously under dynamic loading, which led to the sharp rise of the temperature at the fracture, triggering the formation of hot spots and ignition reaction; the strain softening of THV affected the mechanical properties and failure mode of Hf/THV, and then affected the ignition and reaction of the material; the Hf/THV specimen containing 62wt% Hf showed strong plastic deformation ability due to obvious strain softening, and only after the dynamic loading lasted for a long time did a small part of the specimen fractured, resulting in a long reaction delay time and weak reaction; the Hf/THV specimen containing 88wt% Hf had high strength and strong brittleness, and large-scale fracture occurred in a short time under dynamic loading, resulting in short reaction delay time and violent reaction, but the reduction of oxidant THV led to insufficient reaction.

Key words: Hf/THV, Quasi-staticcompression, Split-Hopkinsonpressurebar, Mechanicalproperty, Ignitionandreactioncharacteristics