Manipulating polymer decomposition to alter burn performance in aluminium/poly(vinylidene fluoride) filaments,Polymer International

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Manipulating polymer decomposition to alter burn performance in aluminium/poly(vinylidene fluoride) filaments
Polymer International ( IF 2.9 ) Pub Date : 2020-09-21 , DOI: 10.1002/pi.6129
Jared W. Strutton ₁ , Matthew Knott ₁ , Jose A. Bencomo ₁ , Scott T. Iacono ₂ , Joseph E. Mates ₃ , Jeffrey R. Alston ₄ , Jena M. McCollum ₁

Affiliation

Filaments composed of aluminium powder and poly(vinylidene fluoride) (PVDF) were produced by melt‐processing to investigate the effect of particle size and loading on decomposition behavior and burn performance. Thermal analysis revealed that nanoscale Al samples decompose PVDF in one step through interactions with the Al particle surface. Microscale samples presented with two distinct decomposition steps: (1) accelerated decomposition through interactions with the Al particle surface and (2) pyrolysis. This behavior occurs due to the drastic change in Al specific surface area. The burn test revealed that the filaments experience a maximum flame speed near the stoichiometric concentration for each fuel size. Although there are variations in decomposition and burn behavior between particle sizes, burn product analysis shows that all melt‐processed filaments result exclusively in AlF₃ formation in open‐air burns. This behavior is unique to melt‐processed energetic composites and may provide more insight to binder–particle interactions and the effect on burn properties in energetic composites. © 2020 Society of Chemical Industry

中文翻译：

操纵聚合物分解以改变铝/聚偏二氟乙烯丝的燃烧性能

通过熔融加工生产了由铝粉和聚偏二氟乙烯（PVDF）组成的长丝，以研究粒径和负载量对分解行为和燃烧性能的影响。热分析表明，纳米级Al样品通过与Al颗粒表面的相互作用一步分解了PVDF。微型样品具有两个不同的分解步骤：（1）通过与Al颗粒表面的相互作用加速分解；（2）热解。由于Al比表面积的急剧变化而发生这种现象。燃烧测试表明，对于每种燃料，细丝在化学计量浓度附近都经历了最大火焰速度。尽管粒度之间的分解和燃烧行为存在差异，₃在露天烧伤中形成。这种行为是熔融加工的高能复合材料所独有的，并且可能为粘合剂与颗粒之间的相互作用以及高能复合材料中燃烧性能的影响提供更多的见解。©2020化学工业协会

更新日期：2020-09-21

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