In this work, a co-microcapsule of magnesium hydroxide (MH) and red phosphorus (RP) (denoted as M[MH&RP]) was synthesized using 4, 4′-diphenylmethane diisocyanate and melamine via one-step in-situ surface polymerization, which was subsequently introduced into ethylene vinyl acetate copolymer (EVA) as a flame retardant. The results indicate that the core-shell structured co-microcapsule displays increased thermal and thermo-oxidative stability as well as better dispersion in EVA. Flame retardancy of the EVA/M[MH&RP] composite improves significantly in comparison with the EVA/MH/RP composite due to formation of continuous and compact char layer on the surface of the composite. Moreover, this flame-retardant composite exhibits excellent water and acid resistance. The addition of a small amount of multi-walled carbon nanotube (MWCNT) further increases flame retardancy of the EVA/M[MH&RP] composite considerably and the flame-retardant EVA/M[MH&RP]/MWCNT composite has good mechanical flexibility and electrical insulation. This work has provided a simple method to prepare multi-functional flame-retardant EVA composite.

在这项工作中，使用4，4'-二苯基甲烷二异氰酸酯和三聚氰胺通过一步原位表面聚合反应合成了氢氧化镁（MH）和红磷（RP）的微胶囊（表示为M [MH＆RP]），随后将其作为阻燃剂引入乙烯乙酸乙烯酯共聚物（EVA）中。结果表明，核-壳结构的共微胶囊显示出增加的热和热氧化稳定性，以及在EVA中的更好分散性。与EVA / MH / RP复合材料相比，EVA / M [MH＆RP]复合材料的阻燃性显着提高，这是由于在复合材料表面形成了连续且致密的炭层。此外，该阻燃复合材料表现出优异的耐水性和耐酸性。少量多壁碳纳米管（MWCNT）的加入进一步提高了EVA / M [MH＆RP]复合材料的阻燃性，并且阻燃EVA / M [MH＆RP] / MWCNT复合材料具有良好的机械柔韧性和电绝缘性。这项工作为制备多功能阻燃EVA复合材料提供了一种简单的方法。