Use of Salen-phosphazene (Salen-PZN) complex for flame retardant polymeric materials demonstrate good flame retardancy due to their abundant flame retardant elements and aromatic-rich structure. To further enhance their flame retardancy and interaction with the matrix, phosphorous (DK) was armed on nickel-based Salen-polyphosphazene complex (DK@Salen-PZN-Ni) as a smart decoration. The composite with DK decoration has higher tensile strength than the DK-free composite. Moreover, cone calorimeter study showed that with 3 wt% total additive loading, the peak heat release rate (pHRR) and peak smoke rate (pSPR) of DK@Salen-PZN-Ni/EP composite were reduced by 21.0% and 30.3%, respectively when compared with pure EP. The limited oxygen index of the composite was 30.2%, while the vertical burning test (UL-94) reached the V-1 rate. Flame retardance mechanism of DK@Salen-PZN-Ni was discussed in detail. The designing of flame retardants alleviated the mechanical property failure and improved the flame retardancy of polymeric composite.

中文翻译：

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一种基于Salen-聚磷腈的智能含DOPO装饰，用于环氧树脂热固性材料的高效阻燃

使用Salen-磷腈（Salen-PZN）配合物作为阻燃聚合物材料，由于其丰富的阻燃元素和富含芳烃的结构，表现出良好的阻燃性。为了进一步增强其阻燃性和与基体的相互作用，磷（DK）被武装在镍基Salen-聚磷腈络合物（DK@Salen-PZN-Ni）上作为智能装饰。带DK装饰的复合材料比不含DK的复合材料具有更高的抗拉强度。此外，锥形量热仪研究表明，在总添加剂含量为 3 wt% 的情况下，DK@Salen-PZN-Ni/EP 复合材料的峰值放热率 (pHRR) 和峰值发烟率 (pSPR) 分别降低了 21.0% 和 30.3%，分别与纯EP相比。复合材料的极限氧指数为30.2%，而垂直燃烧试验（UL-94）达到V-1率。详细讨论了DK@Salen-PZN-Ni的阻燃机理。阻燃剂的设计减轻了聚合物复合材料的力学性能失效并提高了阻燃性。