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Impact of modified alumina oxides on the fire properties of PMMA and PS nanocomposites

机译：改性氧化铝对PMMA和PS纳米复合材料防火性能的影响

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Grafting of ethylene glycol methacrylate phosphate (EGMP) monomer polymerized from alumina nanoparticles has been performed in order to confer a better thermal stability and fire retardancy to PMMA and PS nanocomposites. Grafting and polymerization processes have been investigated using FTIR, TGA, and elemental analyses. Thermal stability and decomposition routes of monomer and polymer grafted alumina have been studied using thermo gravimetric analysis and compared with the thermal behavior of the same alumina modified with octylsilane. The thermal stability of EGMP supported by the nanoparticles is higher than that of free EGMP. The incorporation of 5wt% of both surface treated alumina in PMMA and PS leads to an improvement of thermal stability in comparison with unfilled polymers as well as nanocomposites containing unmodified alumina. Furthermore, the grafting of organic compounds on alumina also allows the peak of heat release rate measured using a cone calorimeter to be significantly reduced for PMMA nanocomposites.
机译：为了赋予PMMA和PS纳米复合材料更好的热稳定性和阻燃性，已经进行了从氧化铝纳米颗粒聚合的乙二醇甲基丙烯酸甲酯（EGMP）单体的接枝。已使用FTIR，TGA和元素分析研究了接枝和聚合过程。用热重量分析法研究了单体和聚合物接枝氧化铝的热稳定性和分解路线，并将其与用辛基硅烷改性的相同氧化铝的热行为进行了比较。纳米颗粒负载的EGMP的热稳定性高于游离的EGMP。与未填充的聚合物以及包含未改性氧化铝的纳米复合材料相比，在PMMA和PS中都加入5wt％的表面处理过的氧化铝可提高热稳定性。此外，有机化合物在氧化铝上的接枝还允许使用锥形量热仪测得的PMMA纳米复合材料的放热速率峰值显着降低。

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