极限氧指数
阻燃剂
环氧树脂
可燃性
烟雾
极限抗拉强度
复合材料
烧焦
燃烧
抗弯强度
燃烧热
化学工程
材料科学
核化学
化学
有机化学
工程类
作者
AI Yuan-fang,Xin-Duo Liu,Weibin Bai,Yucai Lin,Rongrong Xie,Rong-Kun Jian
出处
期刊:Chemosphere
[Elsevier]
日期:2022-03-01
卷期号:291: 132704-132704
被引量:21
标识
DOI:10.1016/j.chemosphere.2021.132704
摘要
In an attempt to alleviate the harmful impact of the flammability of epoxy resin on the environment, amitrole, a herbicide, has been converted to a novel flame retardant (PBA) with lamellar morphology through organophosphorus modification. This material has been utilized to fabricate fire safe epoxy thermosets (EP). EP containing 7.5 wt% PBA undergoes quick self-extinguishment upon ignition. This blend displays a high limiting oxygen index (LOI) value of 34%. More importantly, hazardous products (heat, smoke, toxic gases including CO/CO2) released during combustion of EP, are strongly suppressed in the presence of PBA. The mechanical properties of EP-PBA blends are comparable to those of virgin EP. The tensile strength of EP containing PBA is 90% of that of unmodified EP. The flexural strength of PBA blends is somewhat greater than that for EP containing no additive. A tactful strategy for the transformation of amitrole, a potential environmental contaminant to a benign flame retardant for polymers has been developed.
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