膨胀的
锥形量热计
聚磷酸铵
极限氧指数
阻燃剂
材料科学
热重分析
蒙脱石
复合材料
可燃性
傅里叶变换红外光谱
聚乳酸
炭化
季戊四醇
聚合物
烧焦
化学工程
化学
燃烧
有机化学
工程类
作者
Raíssa Carvalho Martins,Ribeiro Silva,Regina Sandra Veiga Nascimento,Marco Antônio Chaer Nascimento,Mateus Batistella,José‐Marie Lopez‐Cuesta
摘要
Abstract Biobased flame‐retardant polylactic acid composites were prepared using ammonium polyphosphate (AP), lignin, and a raw montmorillonite (ANa) as the intumescent formulation. The concentration of AP and of ANa was varied in order to study its influence on the flammability properties of the composites. The samples were submitted to cone calorimeter test, thermogravimetric analysis coupled to Fourier‐transform infrared spectroscopy (TGA‐FTIR), limiting oxygen index (LOI), and UL‐94 vertical burn. The cone calorimeter residues were analysed through scanning electronic microscopy, X‐ray diffraction, and FTIR. The results show that the combined addition of the intumescent formulation and the ANa leads to an improvement in the fire behavior of the composites, compared with that of the neat polymer. The best fire‐retardant performance was achieved by using the highest AP concentration (17%) and the lowest ANa concentration (1.2%), reaching a LOI value of 39%.
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