The synthesis and application of the bio-derived flame retardant can meet the current requirements for the high-efficient and sustainable development of flame retardants. Therefore, using phytic acid (PA), 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO), and piperazine as raw materials, a PA-derived flame retardant (PAPDOPO) was prepared. Fourier transform infrared spectroscopy and x-ray diffraction techniques were applied to characterize the structure of the PAPDOPO. In the prepared flame-retardant epoxy resin (FEP), PAPDOPO showed high flame retardancy. When 4% PAPDOPO was added into epoxy resin (EP), the prepared FEP (EP-PAPD-4) passed the V-0 level in the UL-94 test, and the limited oxygen index value of EP-PAPD-4 reached 35.3%. Microcombustion calorimetry test was also applied to demonstrate the performance of PAPDOPO. The peak heat release rate of EP-PAPD-4 was reduced by 30.4% compared with that of the pure EP. Due to the low addition amount of PAPDOPO in FEP, the mechanical properties of the FEP using PAPDOPO as flame retardant were hardly decreased compared with pure EP.

中文翻译：

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植酸系阻燃剂环氧树脂的阻燃性能和力学性能

生物源阻燃剂的合成及应用可以满足当前阻燃剂高效、可持续发展的要求。因此，以植酸（PA）、9,10-二氢-9-氧杂-10-磷杂菲-10-氧化物（DOPO）和哌嗪为原料，制备了PA衍生阻燃剂（PAPDOPO）。应用傅里叶变换红外光谱和 X 射线衍射技术来表征 PAPDOPO 的结构。在制备的阻燃环氧树脂（FEP）中，PAPDOPO表现出较高的阻燃性。当环氧树脂（EP）中添加4%的PAPDOPO时，制备的FEP（EP-PAPD-4）在UL-94测试中通过了V-0级，EP-PAPD-4的极限氧指数值达到35.3 %。还应用微燃烧量热测试来验证 PAPDOPO 的性能。EP-PAPD-4的峰值放热率比纯EP降低了30.4%。由于FEP中PAPDOPO的添加量较低，使用PAPDOPO作为阻燃剂的FEP与纯EP相比力学性能几乎没有下降。