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首页> 外文期刊>Journal of Applied Polymer Science >Synthesis and characterization of epoxy based nanocomposites
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Synthesis and characterization of epoxy based nanocomposites

机译：环氧基纳米复合材料的合成与表征

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Epoxy-clay nanocomposites were synthesized to examine the effects of the content and type of different clays on the structure and mechanical properties of the nanocomposites. Diglycidyl ether of bisphenol-A (epoxy) was reinforced by 0.5-11 wt % natural (Cloisite Na+) and organically modified (Cloisite 3013) types of montmorillonite. SEM results showed that as the clay content increased, larger agglomerates of clay were present. Nano-composites with Cloisite 30B exhibited better dispersion and a lower degree of agglomeration than nanocomposites with Cloisite Na+. X-ray results indicated that in nanocomposites with 3 wt % Cloisite 30B, d-spacing expanded from 18.4 angstrom (the initial value of the pure clay) to 38.2 angstrom. The glass transition temperature increased from 73 degrees C, in the unfilled epoxy resin, to 83.5 degrees C in the nanocomposite with 9 wt % Cloisite 30B. The tensile strength exhibited a maximum at I wt % modified clay loading. Addition of 0.5 wt % organically modified clay improved the impact strength of the epoxy resin by 137%; in contrast, addition of 0.5 wt % unmodified clay improved the impact strength by 72%. Tensile modulus increased with increasing clay loading in both types of nanocomposites. (c) 2005 Wiley Periodicals, Inc.
机译：合成了环氧粘土纳米复合材料，以研究不同粘土的含量和类型对纳米复合材料结构和力学性能的影响。双酚A（环氧）的二缩水甘油醚被0.5-11 wt％的天然（Cloisite Na +）和有机改性（Cloisite 3013）类型的蒙脱石增强。 SEM结果表明，随着粘土含量的增加，存在较大的粘土团聚体。具有Cloisite 30B的纳米复合材料比具有Cloisite Na +的纳米复合材料表现出更好的分散性和更低的附聚度。 X射线结果表明，在具有3 wt％的Cloisite 30B的纳米复合材料中，d间距从18.4埃（纯粘土的初始值）扩展到38.2埃。玻璃化转变温度从未填充环氧树脂中的73摄氏度增加到含9 wt％Cloisite 30B的纳米复合材料中的83.5摄氏度。拉伸强度在1wt％的改性粘土负荷下显示出最大值。添加0.5重量％的有机改性粘土使环氧树脂的冲击强度提高了137％。相反，添加0.5重量％的未改性粘土将冲击强度提高了72％。在两种类型的纳米复合材料中，拉伸模量均随粘土含量的增加而增加。 （c）2005年Wiley Periodicals，Inc.

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