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首页> 外文期刊>Journal of Applied Polymer Science >Development of high-performance epoxy/clay nanocomposites by incorporating novel phosphonium modified montmorillonite
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Development of high-performance epoxy/clay nanocomposites by incorporating novel phosphonium modified montmorillonite

机译：通过掺入新型phospho改性蒙脱土开发高性能环氧/粘土纳米复合材料

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摘要

Novel organoclays were synthesized by several kinds of phosphonium cations to improve the dispersibility in matrix resin of composites and accelerate the curing of matrix resin. The possibility of the application for epoxy/clay nanocomposites and the thermal, mechanical, and adhesive properties were investigated. Furthermore, the structures and morphologies of the epoxy/clay nanocomposites were evaluated by transmission electron microscopy. Consequently, the corporation of organoclays with different types of phosphonium cations into the epoxy matrix led to different morphologies of the organoclay particles, and then the distribution changes of silicate layers in the epoxy resin influenced the physical properties of the nanocomposites. When high-reactive phosphonium cations with epoxy groups were adopted, the clay particles were well exfoliated and dispersed. The epoxy/clay nanocomposite realized the high glass-transition temperature (T_g) and low coefficient of thermal expansion (CTE) in comparison with those of neat epoxy resin. On the other hand, in the case of low-reactive phoshonium cations, the dispersion states of clay particles were intercalated but not exfoliated. The intercalated clay did not influence the T_g and CTE of the nanocomposite.
机译：通过几种phospho阳离子合成了新型有机粘土，以提高复合材料在基体树脂中的分散性，并促进基体树脂的固化。研究了环氧/粘土纳米复合材料的应用可能性以及热，机械和粘合性能。此外，通过透射电子显微镜评价环氧/粘土纳米复合材料的结构和形态。因此，将具有不同类型的phospho阳离子的有机粘土掺入环氧基质中导致了有机粘土颗粒的形态不同，然后硅酸盐层在环氧树脂中的分布变化影响了纳米复合材料的物理性能。当采用具有环氧基的高反应性phospho阳离子时，粘土颗粒被充分剥落并分散。与纯环氧树脂相比，环氧/粘土纳米复合材料实现了高玻璃化转变温度（T_g）和低热膨胀系数（CTE）。另一方面，在低反应性磷鎓阳离子的情况下，粘土颗粒的分散状态被嵌入但未剥落。插层粘土不影响纳米复合材料的T_g和CTE。

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