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首页> 外文期刊>Journal of Applied Polymer Science >Nanomechanical study of polycarbonate/boehmite nanoparticles/epoxy ternary composite and their interphases
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Nanomechanical study of polycarbonate/boehmite nanoparticles/epoxy ternary composite and their interphases

机译：聚碳酸酯/勃姆石纳米粒子/环氧三元复合材料的纳米机械研究及其差异

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摘要

Thermoplastic modified thermosets are of great interest especially due to their improved fracture toughness. Comparable enhancements have been achieved by adding different nanofillers including inorganic particles such as nanosized boehmite. Here, we present a nanomechanical study of two composite systems, the first comprising a polycarbonate (PC) layer in contact with epoxy resin (EP) and the second consisting of a PC layer containing boehmite nanoparticles (BNP) which is also in contact with an EP layer. The interaction between PC and EP monomer is tested by in situ Fourier transformed infrared (FT-IR) analysis, from which a reaction induced phase separation of the PC phase is inferred. Both systems are explored by atomic force microscopy (AFM) force spectroscopy. AFM force-distance curves (FDC) show no alteration of the mechanical properties of EP at the interface to PC. However, when a PC phase loaded with BNP is put in contact with an epoxy system during curing, a considerable mechanical improvement exceeding the rule of mixture was detected. The trend of BNP to agglomerate preferentially around EP dominated regions and the stiffening effect of BNP on EP shown by spatial resolved measurements of Young's modulus, suggest the effective presence of BNP within the EP phase.
机译：热塑性改性热固性塑料因其断裂韧性的提高而备受关注。通过添加不同的纳米填料，包括纳米勃姆石等无机颗粒，已经实现了类似的增强。在这里，我们对两个复合系统进行了纳米力学研究，第一个包括与环氧树脂（EP）接触的聚碳酸酯（PC）层，第二个包括含有勃姆石纳米颗粒（BNP）的PC层，该颗粒也与EP层接触。通过原位傅里叶变换红外光谱（FT-IR）分析，研究了PC与EP单体之间的相互作用，推断了PC相的反应诱导相分离。这两个系统都通过原子力显微镜（AFM）力谱进行了探索。AFM力-距离曲线（FDC）显示EP在与PC的界面处的机械性能没有变化。然而，当在固化过程中将负载BNP的PC相与环氧体系接触时，检测到明显的机械改善，超过了混合物的规则。BNP优先聚集在EP主导区域周围的趋势以及杨氏模量的空间分辨测量显示的BNP对EP的硬化效应表明，BNP在EP相内有效存在。

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