ABSTRACT The halogen-free flame retardant (HFFR) styrene-ethylene-butylene-styrene (SEBS)/high impact polystyrene (HIPS)/polyphenylene oxide (PPO) composites filled with aluminium hypophosphite (AHP) and melamine cyanurate (MCA) had been prepared. The thermal stability, flame retardancy, carbon slag structure, mechanical and rheological properties of SEBS/HIPS/PPO composites had been investigated. The research results showed that the thermal stability and flame retardancy of SEBS/HIPS/PPO composites were significantly improved, and there was obvious intumescent FR (IFR) synergism between AHP and MCA. Meanwhile, the role of AHP and MCA in char-forming promotion and carbon slag enhancement was also an important reason. Scanning electron microscopic (SEM) images showed that the char residual structure of sample A-4 showed more compact than that of A-3 which was similar to agglomerated loose sand, and that of A-2 presented an intumescent structure of twisted flake carbon slag after combustion of cone calorimeter. The ultimate tensile strength increased slightly because of the addition of PPO.

中文翻译：

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电缆用SEBS/HIPS/PPO复合材料的成炭及协同阻燃性能研究

摘要 制备了以次磷酸铝（AHP）和氰尿酸三聚氰胺（MCA）为填充物的无卤阻燃剂（HFFR）苯乙烯-乙烯-丁烯-苯乙烯（SEBS）/高抗冲聚苯乙烯（HIPS）/聚苯醚（PPO）复合材料。 . 研究了SEBS/HIPS/PPO复合材料的热稳定性、阻燃性、碳渣结构、力学和流变性能。研究结果表明，SEBS/HIPS/PPO复合材料的热稳定性和阻燃性显着提高，AHP和MCA之间存在明显的膨胀型FR（IFR）协同作用。同时，AHP和MCA在促进成炭和增强碳渣方面的作用也是一个重要原因。扫描电镜(SEM)图像表明，样品A-4的残炭结构比A-3的更致密，类似于团聚的松散砂，而A-2的则呈现出扭曲片状碳渣的膨胀结构。锥形量热仪燃烧后。由于 PPO 的加入，极限抗拉强度略有增加。