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Effect of stress and temperature on the thermomechanical degradation of a PE-LD/OMMT nanocomposites

机译：应力和温度对PE-LD / OMMT纳米复合材料热机械降解的影响

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Thermomechanical degradation of nanocomposites is a topical issue that has not been fully investigated as demonstrated by the low number of papers available in the literature regarding this specific aspect. In particular, with regards to low density polyethylene/clay nanocomposites, the degradation behavior is very complex since it involves the degradation paths of both the polymer matrix and the organomodified nanoclay. In the present work, the effects of mechanical stress and temperature on the thermomechanical behavior of PE-LD/organomodified clay nanocomposites and the degradation paths were investigated by rheological, FT-IR and mechanical methods. The results have shown that the thermomechanical degradation mechanisms are very complex, involving several phenomena such as chain scission, branching, recrystallization and crosslinking, degradation of the organomodified clay and interaction between the degradation products of both system components. These interactions between the degradation products of the organomodifier and the polymer matrix can deeply influence the final behavior of the nanocomposite in a way which is similar to what usually happens in polymer blends.
机译：纳米复合材料的热机械降解是一个尚未广泛研究的热点问题，文献中有关该特定方面的论文数量较少，证明了这一问题。特别地，关于低密度聚乙烯/粘土纳米复合材料，降解行为非常复杂，因为它涉及聚合物基质和有机改性纳米粘土的降解途径。在目前的工作中，通过流变，红外光谱和力学方法研究了机械应力和温度对PE-LD /有机改性粘土纳米复合材料热力学行为和降解途径的影响。结果表明，热机械降解机理非常复杂，涉及多种现象，例如断链，支化，重结晶和交联，有机改性粘土的降解以及两种体系组分的降解产物之间的相互作用。有机改性剂的降解产物和聚合物基质之间的这些相互作用可以以类似于聚合物共混物中通常发生的方式，深刻影响纳米复合材料的最终行为。

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