阻燃剂
可燃性
烟雾
烧焦
燃烧
环氧树脂
植酸
材料科学
锥形量热计
化学工程
化学
极限氧指数
核化学
离子液体
有机化学
复合材料
工程类
生物化学
作者
Fang Fang,Siqi Huo,Haifeng Shen,Shiya Ran,Hao Wang,Pingan Song,Zhengping Fang
标识
DOI:10.1016/j.coco.2019.11.011
摘要
Developing high efficient, environmentally friendly and bio-based flame retardants for combustible polymers has gained increasing interest. Herein, a novel highly efficient biomass-derived flame retardant ([email protected]) with different oxidation state phosphorus is prepared via neutralization of phytic acid (PA) and phenylphosphonate-based compound (EHPP). Due to synergistic effect between PA and EHPP, the incorporation of [email protected] significantly improves the flame-retardant performances of epoxy resin (EP), bringing about 64% reduction in peak heat release rate (pHRR) and 16% reduction in total heat release (THR). Additionally, EP/[email protected] also displays excellent smoke suppression performance, exhibiting 45% reduction in peak CO production (pCOP), 61% reduction in peak smoke release production rate (pSPR), and 21% reduction in total smoke production (TSP). The flame-retardant mechanism of [email protected] is further investigated, indicating that [email protected] effectively exerts flame-retardant effect in the condensed and gaseous phases during combustion. In the condensed phase, phytic acid facilitates the formation of a protective char shield, while in the gas phase, EHPP releases PO· and NO· to quench active radicals and inhibits the combustion.
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