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首页> 外文期刊>Journal of Materials Science >REACTIVITIES OF ALUMINIUM AND ALUMINIUM-MAGNESIUM ALLOY POWDERS IN POLYMERIC COMPOSITES
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REACTIVITIES OF ALUMINIUM AND ALUMINIUM-MAGNESIUM ALLOY POWDERS IN POLYMERIC COMPOSITES

机译：铝和铝镁合金粉末在聚合物复合物中的反应性

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Polymeric compositions containing Al-Mg alloys show higher reactivities, in comparison with similar compositions containing aluminium. This is observed irrespective of the amount of oxidizer, type of oxidizer used, type of polymeric binder, and over a range of the particle sizes of the metal additive. This is evident from the higher calorimetric values obtained for compositions containing the alloy, in comparison to samples containing aluminium. Analysis of the combustion residue shows the increase in calorimetric value to be due to the greater extent of oxidation of the alloy. The interaction between the polymeric binder and the alloy was studied by coating the metal particles with the polymer by a coacervation technique. On ageing in the presence of ammonium perchlorate, cracking of the polymer coating on the alloy was noticed. This was deduced from differential thermal analysis experiments, and confirmed by scanning electron microscopic observations. The increase in stiffness of the coating, leading to cracking, has been traced to the cross-linking of the polymer by magnesium. [References: 21]
机译：与包含铝的类似组合物相比，包含Al-Mg合金的聚合物组合物显示出更高的反应性。无论氧化剂的量，所使用的氧化剂的类型，聚合物粘合剂的类型以及金属添加剂的粒径范围内的大小，都可以观察到这一点。从与包含铝的样品相比，对于包含合金的组合物获得的更高的量热值，这是显而易见的。燃烧残余物的分析表明，量热值的增加是由于合金氧化程度更大。通过凝聚法通过用聚合物涂覆金属颗粒来研究聚合物粘合剂与合金之间的相互作用。在高氯酸铵存在下进行时效处理时，发现合金上的聚合物涂层开裂。这是从差热分析实验推论得出的，并通过扫描电子显微镜观察得到证实。涂层刚度的增加（导致开裂）可追溯到镁与聚合物的交联。 [参考：21]

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