A novel strategy was developed for the preparation of melamine polyphosphate (MPP) nanowires to achieve a superior flame‐retardant poly (ethylene terephthalate) (PET). Thanks to the well‐designed nanostructure, the prepared MPP nanowires exhibited great thermal stability and flame retardance. Herein with incorporation of only 1‐wt% MPP nanowires (PET/FR1.0 nanocomposite), the limiting oxygen index (LOI) value was dramatically increased to 29.4% from 20.5%, showing self‐extinguishing behavior. Moreover, PET/FR1.0 nanocomposite passed V‐0 UL‐94 rating in the vertical combustion test. However, PET containing 5‐wt% commercial MPP powder (PET/FR_C5.0) only showed a LOI of 27.9% and ignited the absorbent cotton with flammable melt‐droplets. Cone results also presented that introducing 1‐wt% MPP nanowires brought about a crucial decrease in fire hazard of PET, for instance, 11.1% and 7.7% maximum reduction in heat release rate and total heat release, respectively. Thermogravimetric analysis/infrared spectrometry (TG‐FTIR) result indicated that the main pyrolysis volatiles generated from PET degradation including benzoic acid, aromatic compounds, and carbon dioxide were apparently suppressed after introducing MPP nanowires into PET matrixes, suggesting the outstanding obstructing effect of graphited char residue formed in the combustion. This enhanced flame retardancy rooting in addition of MPP nanowires can be attributed to the combined dilution effect in gaseous phase and catalytic carbonization effect in condensed phase.

中文翻译：

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新型三聚氰胺多磷酸盐纳米线实现的阻燃聚对苯二甲酸乙二醇酯

开发了一种用于制备三聚氰胺三聚氰胺（MPP）纳米线的新策略，以实现优异的阻燃性聚对苯二甲酸乙二醇酯（PET）。得益于精心设计的纳米结构，制备的MPP纳米线表现出出色的热稳定性和阻燃性。在这里，仅掺入1wt％的MPP纳米线（PET / FR1.0纳米复合材料），极限氧指数（LOI）值从20.5％急剧增加到29.4％，表现出自熄性。此外，PET / FR1.0纳米复合材料在垂直燃烧测试中通过了V-0 UL-94评级。但是，PET含有5wt％的商用MPP粉末（PET / FR _C5.0）的LOI仅为27.9％，并用易燃的熔滴点燃了吸水棉。Cone结果还表明，引入1-wt％的MPP纳米线可极大地降低PET的火灾隐患，例如，最大放热率和总放热率分别降低11.1％和7.7％。热重分析/红外光谱（TG-FTIR）结果表明，将MPP纳米线引入PET基质后，PET降解产生的主要热解挥发物（包括苯甲酸，芳族化合物和二氧化碳）被明显抑制，这表明石墨炭具有显着的阻隔作用。在燃烧中形成的残留物。