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首页> 外文期刊>Polymers for advanced technologies >The thermal degradation of poly(methyl methacrylate) nanocomposites with montmorillonite, layered double hydroxides and carbon nanotubes
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The thermal degradation of poly(methyl methacrylate) nanocomposites with montmorillonite, layered double hydroxides and carbon nanotubes

机译：蒙脱土，层状双氢氧化物和碳纳米管对聚甲基丙烯酸甲酯纳米复合材料的热降解

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摘要

The thermal degradation of poly(methyl methacrylate) and its nanocomposite has been studied to determine if the presence of clays (anionic and cationic) or carbon nanotubes has an effect on the degradation pathway. Nanocomposite formation has been established by X-ray diffraction and transmission electron microscopy, thermal degradation has been investigated by cone calorimetry and thermogravimetric analysis (TGA), and the products of degradation have been studied with TGA/FT-IR and gas chromatography/mass spectrometry (GC/MS). There are no marked differences in the degradation products of the polymer and its nanocomposites, but the degradation of the nanocomposite occurs at higher temperatures. The most likely explanation is that poly(methyl methacrylate) degrades by only a single route, so the clay cannot promote one pathway at the expense of another. This observation bears important implications for the barrier mechanism, which is currently used to explain the reduction in the peak heat release rate of nanocomposites.
机译：已经对聚甲基丙烯酸甲酯及其纳米复合材料的热降解进行了研究，以确定粘土（阴离子和阳离子）或碳纳米管的存在是否会对降解途径产生影响。通过X射线衍射和透射电子显微镜确定了纳米复合材料的形成，通过锥形量热法和热重分析（TGA）研究了热降解，并通过TGA / FT-IR和气相色谱/质谱法研究了降解产物。 （GC / MS）。聚合物及其纳米复合材料的降解产物没有显着差异，但是纳米复合材料的降解发生在较高的温度下。最可能的解释是聚（甲基丙烯酸甲酯）只能通过单一途径降解，因此粘土不能以一种途径为代价促进一种途径。该观察结果对阻挡机理具有重要意义，该阻挡机理目前用于解释纳米复合材料峰值放热速率的降低。

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