This work investigates the application of polyphosphazene (PZN) modified magnesium hydroxide (MH) crosslinked by boric acid (BA) (MH-PZPI-BA) for simultaneous flame retardant, smoke suppression and mechanical properties enhancement of ethylene-vinyl acetate (EVA) nanocomposites. The MH-PZPI-BA was prepared by a PZN nano-coating made from hexachlorocyclotriphosphazene and branched polyethyleneimine (bPEI) was deposited onto the MH followed by BA cross-linking bPEI. Then MH-PZPI-BA was incorporated into EVA, and the properties were examined. Compared with pure EVA, the peak heat release rate and total heat released decreased by 82.7% and 44.2%, respectively. The MH-PZPI-BA has an excellent performance in reducing the smoke, CO, and CO₂ production rates. The "tortuous path" effect of the boron nitride of in-situ growth hindered the transfer of volatile products, and led to the formation of a compact and robust char layer in condensed phase during combustion, in the combustion process of EVA/MH-PZPI-BA. The tensile strength and elongation at break are improved by 26.1% and 33.5%, respectively.

这项工作研究了由硼酸（BA）（MH-PZPI-BA）交联的聚磷腈（PZN）改性的氢氧化镁（MH）在同时阻燃，抑制烟雾和增强乙烯-乙酸乙烯酯（EVA）纳米复合材料的机械性能中的应用。通过由六氯环三磷腈制成的PZN纳米涂层制备MH-PZPI-BA，并将支链聚乙烯亚胺（bPEI）沉积到MH上，然后进行BA交联bPEI。然后将MH-PZPI-BA掺入EVA中，并检查其性能。与纯EVA相比，峰值放热率和总放热分别降低了82.7％和44.2％。MH-PZPI-BA在减少烟雾，CO和CO ₂方面具有出色的性能生产率。在EVA / MH-PZPI的燃烧过程中，原位生长的氮化硼的“曲折路径”效应阻碍了挥发性产物的转移，并导致在冷凝过程中在凝结相中形成致密而坚固的炭层。 -BA 拉伸强度和断裂伸长率分别提高了26.1％和33.5％。