Understanding the Consequences of Intercalation Using Model Polymer Nanolaminates
Understanding the Consequences of Intercalation Using Model Polymer Nanolaminates
复制标题
了解使用模型聚合物纳米层压材料插层的后果
DOI：
10.1021/acs.macromol.5b01788
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发表时间：
2015
期刊：
影响因子：
5.5
通讯作者：
D. Schmidt
中科院分区：
文献类型：
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作者：
Erik Dunkerley;D. Schmidt
尽管人们对二维纳米填料很感兴趣，但聚合物插层对性能的影响仍然知之甚少。我们使用自动喷雾沉积来形成两种排列良好的聚合物/粘土纳米层压材料，它们在粘土改性剂中的一个甲基不同；这一差异导致在一种情况下出现插层，而在另一种情况下则没有插层。动态机械性能和透气性与微机械和屏障模型以及存在的结构和相的详细描述一起报告。观察到的模量变化不能用通常应用于聚合物纳米复合材料的微机械模型来解释。与“有效粒子”论点相反，阻隔性能由单层纵横比决定。这些发现与各种“实体”混合体都有相关性。此外，这些系统代表了几乎所有纳米复合材料中发现的多层堆叠的宏观等效物，对……具有广泛的影响。
In spite of significant interest in 2D nanofillers, the effect of polymer intercalation on properties remains poorly understood. We use automated spray deposition to form two families of well-aligned polymer/clay nanolaminates that differ by one methyl group in the clay modifier; this difference results in intercalation in one instance and no intercalation in the other. Dynamic mechanical properties and gas permeability are reported alongside micromechanical and barrier models and a detailed description of the structures and phases present. Observed variations in modulus cannot be explained by micromechanical models often applied to polymer nanocomposites. In contrast with “effective particle” arguments, barrier properties are dominated by single layer aspect ratios. These findings have relevance for all manner of “bricks and mortar” hybrids. Additionally, these systems represent the macroscopic equivalent of the multilayer stacks found in practically all nanocomposites, with wide-ranging implications for...