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首页> 外文期刊>Proceedings of the Institution of Mechanical Engineers. Part L, Journal of Materials: Design and Application >Effect of mixing parameters, postcuring, and stoichiometry on mechanical properties of fiber reinforced epoxy-clay nanocomposites
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Effect of mixing parameters, postcuring, and stoichiometry on mechanical properties of fiber reinforced epoxy-clay nanocomposites

机译：混合参数，后固化和化学计量对纤维增强环氧树脂纳米复合材料的力学性能的影响

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摘要

The influence of processing variables was experimentally studied for glass fiber reinforced epoxy-clay nanocomposites manufactured using vacuum-assisted wet layup method. The tensile strength, flexural strength, and interlaminar shear strength of these nanocomposites were significantly influenced by the processing variables including the temperature of resin-clay mixture, speed of homogenization, and ultrasonic probe amplitude during premixing of clay minerals in epoxy. The glass transition temperature of glass fiber reinforced composites increased with incorporation of clay minerals in epoxy. Also, the postcuring of the laminates was carried out at three different temperatures, e.g. 100, 130, and 150 celcius for 3 h. A decrease in tensile modulus, tensile strength, and flexural strength of nanocomposites postcured at 130 and 150 celcius was observed. Also, the use of non-stoichiometric epoxy resin and hardener ratios had an adverse effect on mechanical properties of fiber reinforced epoxy-clay nanocomposites. In fiber reinforced composites incorporating clay minerals, a uniform dispersion of clay minerals besides a strong interfacial adhesion between clay minerals and polymer and optimum conditions of curing of matrix is a crucial aspect for improved performance over conventional fiber reinforced composites.
机译：通过真空辅助湿式铺敷法制造的玻璃纤维增​​强环氧树脂纳米复合材料实验研究了处理变量的影响。这些纳米复合材料的拉伸强度，弯曲强度和层间剪切强度受到包括树脂 - 粘土混合物，均质速度的温度，均质速度和超声探头在环氧树脂中的预混合过程中的超声探针振幅的显着影响。玻璃纤维增​​强复合材料的玻璃化转变温度随环氧树脂中的粘土矿物掺入而增加。而且，层压板的后皮在三种不同的温度下进行，例如，在三种不同的温度下进行。 100,130和150个Celcius 3小时。观察到在130和150个塞尔西乌斯在130和150胞叶片时的纳米复合材料的拉伸模量，拉伸强度和抗弯曲强度的降低。而且，使用非化学计量环氧树脂和硬化比对纤维增强环氧树脂纳米复合材料的机械性能产生不利影响。在结合粘土矿物的纤维增强复合材料中，除了粘土矿物和聚合物之间的强界面粘合之外，粘土矿物的均匀分散和基质的最佳固化条件是用于改善常规纤维增强复合材料的关键方面。

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