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首页> 外文会议>3rd European weathering symposium : Natural and artificial ageing of polymers >DEGRADATION OF POLYURETHANE/POSSNANOCOMPOSITES
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DEGRADATION OF POLYURETHANE/POSSNANOCOMPOSITES

机译：聚氨酯/正硅复合材料的降解

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摘要

Polyhedral oligomeric silsesquioxanes (POSS) combining unique inorganic-organicrnchemical compositions with nano-sized cage structures have long been important andrninteresting class of materials. The incorporation of POSS cages into polymericrnmaterials often results in reinforced improvements in polymer nanocomposites’rnproperties such as increases in use temperature and oxidation resistance, in improvedrnmechanical properties, as well as reductions in flammability and heat evolution. Morernimportantly, these POSS nanoparticles can be chemically incorporated in the polymerrnstructure, yielding material with tailorable interfacial properties. Therefore, POSS,rnhaving these interesting structural features in addition to good mechanical and thermalrnproperties, are one of the most promising nanostructures in the field of advancedrnmaterial science.rnWe have synthesized and characterised the degradation behaviour of a series ofrnpolyurethane (PU)/POSS nanocomposites. These hybrid polymers display improvedrnproperties such as higher Tg, increased oxygen permeability, reduced flammability andrnenhanced mechanical strength, whereby degradation route should be established forrnapplication purposes.
机译：多面体低聚倍半硅氧烷（POSS）结合了独特的无机有机化学组成和纳米尺寸的笼状结构，一直是重要且有趣的材料类别。将POSS保持架结合到聚合物材料中通常可以增强聚合物纳米复合材料的性能，例如提高使用温度和抗氧化性，改善机械性能以及降低可燃性和放热。更重要的是，可以将这些POSS纳米粒子化学结合到聚合物结构中，从而产生具有可定制界面特性的材料。因此，除具有良好的机械和热性能外，还具有这些有趣的结构特征的POSS是先进材料科学领域中最有前途的纳米结构之一。我们已经合成并表征了一系列聚氨酯（POS）/ POSS纳米复合材料的降解行为。这些杂化聚合物表现出改进的性能，例如更高的Tg，增加的氧渗透性，降低的可燃性和增强的机械强度，因此应建立降解途径以用于应用目的。

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