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Study on the structure and properties of cyanate ester/bentonite nanocomposites

机译:氰酸酯/膨润土纳米复合材料的结构与性能研究

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Cyanate ester (CE)/bentonite (BT) nanocomposites were prepared by melt blending of CE with NH4+-BT. The nanostructure of CE/BT nanocomposites was studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). It was found that partially intercalated and partially exfoliated structures coexisted in CE/BT nanocomposites containing 2.5 wt % BT with respect to that of bulk CE. Below 2.5 wt % BT content, a totally exfoliated and disordered structure was formed in the nanocomposites. The exfoliated BT enhanced the toughness of CE/BT nanocomposites. The impact strength showed a maximum of 7.1 kJ/m(2) at 1 wt % BT, compared to 3.8 kJ/m(2) of pure CE. Furthermore, results of thermogravimetric analysis (TGA) suggest that CE/BT nanocomposites have higher thermal stability. (c) 2005 Wiley Periodicals, Inc.
机译:通过将CE与NH4 + -BT熔融共混来制备氰酸酯(CE)/膨润土(BT)纳米复合材料。通过X射线衍射(XRD),扫描电子显微镜(SEM)和透射电子显微镜(TEM)研究了CE / BT纳米复合材料的纳米结构。发现相对于本体CE而言,部分嵌入和部分剥离的结构共存于含有2.5wt%BT的CE / BT纳米复合材料中。低于2.5 wt%的BT含量,在纳米复合材料中形成了完全剥落和无序的结构。脱落的BT增强了CE / BT纳米复合材料的韧性。相对于纯CE 3.8 kJ / m(2),冲击强度显示出在1 wt%BT时最大为7.1 kJ / m(2)。此外,热重分析(TGA)的结果表明CE / BT纳米复合材料具有更高的热稳定性。 (c)2005年Wiley Periodicals,Inc.

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