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

聚偏二氟乙烯（PVDF）中的分子量（M w）影响会影响高能Al–PVDF丝的加工性能和燃烧行为。结果表明，在空载和贫燃料的（即15 wt％Al）长丝中粘度降低。如傅立叶变换红外光谱法所证实的，在高负载长丝（即30 wt％的Al）中，由于Al颗粒与低M w链之间的较高的静电相互作用，粘度降低极小。热和燃烧分析放热活动PVDF具有较小的降低进一步证实了这个故事中号W¯¯链。差示扫描量热法和热重分析表明，低M时反应焓降低，焦炭产率降低w PVDF。焓下降趋势的非平衡燃烧率的研究，其证实，燃烧率较低的情况下降低持续中号W¯¯ PVDF。此外，粉末X射线图案的后燃烧产品表明，低中号瓦特PVDF分解产生导致可忽略的AlF铝粒子表面附近的扩散阻挡3形成在富燃料的长丝。