Effects of different fluoropolymers on the exothermic reaction characteristics of fluorinated thermite

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Abstract To investigate the differences in exothermic reactions and combustion performance of fluorinated thermite systems containing various fluoropolymers, Al/Fe 2 O 3 was used as the thermite matrix, and different fluoropolymers—THV and PVDF—were selected. Al/Fe 2 O 3 /THV and Al/Fe 2 O 3 /PVDF materials were prepared using a ball-milling mixing process. SEM and XRD were used to characterize the microstructure of the fluorinated thermite before and after combustion, while an oxygen bomb calorimeter and a simultaneous thermal analysis instrument (TG-DSC) were employed to analyze the heat release density of the fluorinated thermite. The results showed that the reaction heat of the THV-containing thermite was 3141 J/g, while that of the PVDF-containing thermite was 3289 J/g. The addition of fluoropolymers to the thermite results in a cumulative superposition of exothermic reactions, thereby increasing the energy release of the thermite.

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