Vothi Hai, Kim Chowon, Nguyen TanBinh, Lee Jinwoo, Nguyen Lan-Anh T, Suhr Jonghwan
Center for Composite Materials & Concurrent Design, Research & Business Foundation, Sungkyunkwan University Suwon 16419 Republic of Korea
University of Science Ho Chi Minh City Vietnam.
RSC Adv. 2023 Feb 9;13(8):5219-5227. doi: 10.1039/d2ra07297a. eCollection 2023 Feb 6.
An aluminum methylmethoxyphosphonate (AlPo)-based flame retardant (FR) was synthesized. Thermal degradation and flame retardancy of nylon 6 (PA6)/AlPo composites were examined and compared with PA6/commercial aluminum diethylphosphinate (AlPi) composites. The PA6/AlPo composite achieved a V-0 rating at 20 wt% loading during the UL-94 test, and it exhibited the formation of a charred layer that protected the polymer from burning and reduced the release of gases during the combustion of PA6. AlPo demonstrated exceptional performance in gaseous and condensed phases in the PA6 matrix, whereas AlPi only worked in the gaseous phase. The differences between the thermal degradation mechanisms and flame retardancies of AlPi and AlPo were investigated Fourier-transform infrared (FT-IR) spectroscopy, thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and cone calorimetry. A suitable degradation mechanism was proposed to aid the development of flame retardants in the future.
合成了一种基于甲基甲氧基膦酸铝（AlPo）的阻燃剂（FR）。对尼龙6（PA6）/AlPo复合材料的热降解和阻燃性能进行了研究，并与PA6/商用二乙基次膦酸铝（AlPi）复合材料进行了比较。在UL-94测试中，PA6/AlPo复合材料在20 wt%的添加量下达到了V-0等级，并且在PA6燃烧过程中形成了一层炭化层，该炭化层保护聚合物不被燃烧并减少了气体释放。AlPo在PA6基体的气相和凝聚相中均表现出优异的性能，而AlPi仅在气相中起作用。利用傅里叶变换红外（FT-IR）光谱、热重分析（TGA）、扫描电子显微镜（SEM）和锥形量热法研究了AlPi和AlPo的热降解机理和阻燃性能之间的差异。提出了一种合适的降解机理，以辅助未来阻燃剂的开发。
