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Insights into the role of interface in the rheological property of underfill composites

机译:深入了解界面在底部填充复合材料流变特性中的作用

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With the use of nano-sized silica particles as fillers, the rheological property of the underfill composites is greatly deteriorated, due to the excessive surface energy of the nano-sized fillers and their poor interfacial compatibility with the underfill matrix. Since interface property is one of the dominant factors for determining the properties of composites, in this study, four kinds of silica nanoparticles with different surface chemistry were used to comparatively study the role of interface in the rheological property of amine-cured epoxy underfill composites. And it is found that the fillers with surface functional groups, which have reactivity or good compatibility with the underfill base materials, could not only drastically decrease the viscosity, but also largely improve the viscosity stability of the underfill composites.
机译:在使用纳米级二氧化硅颗粒作为填料的情况下,由于纳米级填料的过量表面能以及它们与底层填料基体的不良界面相容性,底层填料复合材料的流变性能大大降低。由于界面性能是决定复合材料性能的主要因素之一,因此,本研究使用四种表面化学不同的二氧化硅纳米粒子,比较研究了界面在胺固化环氧底层填充材料流变性能中的作用。并且发现具有表面活性基团的填料,其与底部填充基材具有反应性或良好的相容性,不仅可以大大降低粘度,而且可以大大提高底部填充复合材料的粘度稳定性。

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