阻燃剂
极限氧指数
材料科学
热稳定性
韧性
极限抗拉强度
复合材料
聚合
聚合物
化学工程
燃烧
有机化学
化学
工程类
烧焦
作者
Jiabing Feng,Yonglin Lu,Hongyan Xie,Yan Zhang,Siqi Huo,Xiaohuan Liu,Matthew T. Flynn,Zhiguang Xu,Paulomi Burey,Mark Lynch,Hao Wang,Pingan Song
标识
DOI:10.1016/j.jmst.2023.04.003
摘要
Renewable and biodegradable polylactide (PLA) has excellent mechanical strength but is highly flammable which restricts its practical applications. Many phosphorus/nitrogen (P/N)-based flame retardants are effective in PLA, but their high addition loading usually decreases the mechanical strength of the PLA bulk. For polyphosphoramides, despite high fire-retardant efficiency, their chemical synthesis often generates chemical wastes as byproducts. Herein, we report an atom-economic and highly efficient oligomeric P/N fire retardant (APN) prepared using a mild Michael addition polymerization with no byproducts. Using only 3 wt% APN, the resulting PLA exhibits desired fire retardancy including a UL-94 V-0 rating and a limiting oxygen index of 37.6%. Furthermore, the toughness of the fire-retardant PLA increases by 85% compared to pure PLA, with both tensile strength and thermal stability preserved. This work offers an atom-economic strategy for synthesizing highly efficient P/N fire retardants for use in the creation of fire-resistant PLA with robust mechanical properties.
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