In order to improve the performance of inorganic/organic composites, aluminum trihydroxide (ATH) core composites with a styrene‐ethylene‐butadiene‐styrene block copolymer grafted with maleic anhydride (MAH‐g‐SEBS) shell phase, and P‐N flame retardant as a synergistic agent, were prepared through an interface design. The effects of polyethylene glycol (PEG) content on the interfacial interaction, flame retardancy, thermal properties, and mechanical properties of high‐density polyethylene (HDPE)/ATH composites were investigated by small angle X‐ray diffraction, rotational rheometer, limiting oxygen index, thermogravimetric analysis (TGA), and tensile testing. The ATH synergistic effects of P‐N flame‐retardant improved the combustion performance of HDPE/ATH/PEG(3%)/MAH‐g‐SEBS/P‐N (abbreviated as HDPE/MH3/M‐g‐S/P‐N) composite by forming more carbon layer, increased the elongation at break from 21% to 558% compared to HDPE/ATH, and increased the interface thickness from 0.447 to 0.891 nm. SEM results support the compatibility of ATH with HDPE increased and the interfacial effect was enhanced. TGA showed the maximum decomposition temperature of the two stages and the yield of the residue at high temperature increased first and then decreased with the increase of PEG content. Rheological behavior showed the storage modulus, complex viscosity, and the relaxation time initially increased and then decreased with the increase of PEG content indicating PEG, M‐g‐S, and ATH powder gradually formed a partial coating, then a full coating, and finally an over‐coated core‐shell structured model.

中文翻译：

---

三氢氧化铝和P‐N核壳结构的设计及其对无卤阻燃聚乙烯复合材料的协同作用

为了提高无机/有机复合材料的性能，三氢氧化铝（ATH）核芯复合材料采用苯乙烯-乙烯-丁二烯-苯乙烯嵌段共聚物接枝马来酸酐（MAH- g- SEBS）壳相和PN阻燃剂作为协同剂，是通过界面设计制备的。通过小角度X射线衍射，旋转流变仪，极限氧指数研究了聚乙二醇（PEG）含量对高密度聚乙烯（HDPE）/ ATH复合材料的界面相互作用，阻燃性，热性能和机械性能的影响，热重分析（TGA）和拉伸测试。P‐N阻燃剂的ATH协同作用改善了HDPE / ATH / PEG（3％）/ MAH‐ g的燃烧性能‐SEBS / P‐N（缩写为HDPE / MH3 / M‐ g ‐S / P‐N）复合材料，通过形成更多的碳层，与HDPE / ATH相比，断裂伸长率从21％增加到558％，并增加了界面厚度从0.447到0.891 nm。SEM结果表明，ATH与HDPE的相容性增加，界面作用增强。TGA显示出两个阶段的最高分解温度，并且随着PEG含量的增加，高温下残留物的产率先升高然后降低。流变行为显示的储能模量，复数粘度和弛豫时间先上升然后用PEG含量的指示PEG的增加而降低，M-克-S和ATH粉末逐渐形成部分涂层，然后形成完整涂层，最后形成过度涂层的核壳结构模型。