In this manuscript, flame-retardant and smoke-suppressant flexible polyurethane foams (FPUFs) were designed and synthesized based on novel liquid phosphorus-containing polyol named as PDEO and expandable graphite (EG). The reactive PDEO can be chemically added into the chain of FPUF, while expandable graphite was blended into the matrix of foam through foaming process. Benefitting from the incorporation of reactive PDEO with a long chain, the resultant FPUF containing EG exhibited considerable mechanical properties. More importantly, the synergistic effect of PDEO and EG can endow FPUF with great flame retardancy, anti-driping performances. Furthermore, the resultant FPUF/EG/PDEO foams exhibit considerable smoke suppression performances. The vertical burning test revealed that the FPUF containing 5 php PDEO and 10 php EG extinguished quickly without dripping and kept the original shape after removing the igniter. The cone calorimeter results demonstrated that the synergistic effect of PDEO and EG could effectively reduce the heat release rate (HRR) and total release rate (THR) of the composite foam. Remarkably, the smoke production release (SPR), total smoke production (TSP), light transmission and specific optical density results indicated significantly smoke-suppressant properties of the composite foam. The mechanism analysis confirmed that the synergistic effect of gas-condensed bi-phase action from PDEO and EG contributed the great flame retardation of the composite foam. This novel FPUF provides a promising strategy for producing the polymer foam with flame retardation, smoke suppression and anti-dripping performances.

在此手稿中，基于名为PDEO的新型液态含磷多元醇和可膨胀石墨（EG），设计并合成了阻燃，抑烟的柔性聚氨酯泡沫（FPUF）。可以将反应性PDEO化学添加到FPUF链中，同时通过发泡过程将可膨胀石墨共混到泡沫基质中​​。得益于反应性PDEO与长链的结合，所得的含EG的FPUF表现出可观的机械性能。更重要的是，PDEO和EG的协同作用可赋予FPUF极大的阻燃性，抗干性。此外，所得的FPUF / EG / PDEO泡沫显示出显着的抑烟性能。垂直燃烧测试表明，包含5 php PDEO和10 php EG的FPUF迅速熄灭，没有滴落，并且在移除点火器后仍保持原始形状。锥形量热仪的结果表明，PDEO和EG的协同作用可以有效降低复合泡沫的热释放速率（HRR）和总释放速率（THR）。显着地，烟雾释放（SPR），总烟雾产生（TSP），透光率和比光密度结果表明，该复合泡沫具有显着的抑烟性能。机理分析证实，PDEO和EG的气体凝结两相作用的协同作用促进了复合泡沫的阻燃性。这种新颖的FPUF为生产具有阻燃性的聚合物泡沫提供了一种有前途的策略，