Balancing processing ease with combustion performancein aluminum/PVDF energetic filaments

Molecular weight (Mw) effects in poly(vinylidene fluoride) (PVDF) influence both processability and combustion behavior energetic Al–PVDF filaments. Results show decreased viscosity unloaded fuel-lean (i.e., 15 wt% Al) In highly loaded filaments 30 Al), reduced is minimal due to higher electrostatic interaction between Al particles low Mw chains as confirmed by Fourier-transform infrared spectroscopy. Thermal analysis further corroborates this story exothermic activity decreases PVDF with smaller chains. Differential scanning calorimetry Thermogravimetric reaction enthalpy lower char yield PVDF. Enthalpy reduction trends continued nonequilibrium burn rate studies, which confirm that the presence of Furthermore, powder X-ray patterns post-burn products suggest decomposition creates a diffusion barrier near particle surface resulting negligible AlF3 formation fuel-rich