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采用自制的双甲氧基苯甲酸根离子柱撑镁铝类水滑石(MgAl-HTlcs)和己内酰胺(CL)为主要原料,利用反应挤出工艺制备了纳米MgAl-HTlcs/尼龙6复合材料,研究了MgAl-HTlcs含量对复合材料结构与性能的影响。TEM照片显示:MgAl-HTlcs在复合材料中呈纳米级均匀分散,当MgAl-HTlcs含量为1.0wt%(占MgAl-HTlcs与CL总质量的质量分数)时出现了部分片层剥离的类水滑石。紫外光谱结果表明:与纯尼龙6相比,少量均匀分散的MgAl-HTlcs使复合材料对近紫外波长为320~380nm的紫外线吸收效果明显。XRD和DSC结果表明:少量均匀分散的MgAl-HTlcs对尼龙6起到了很好的异相成核剂的作用,不仅提高了其结晶温度,也增加了其结晶度。热重分析显示:部分片层剥离MgAl-HTlcs的存在明显提高了复合材料的热稳定性。
Nano-MgAl-HTlcs / Nylon 6 composites were prepared by reactive extrusion using self-made MgAl-HTlcs and caprolactam (CL) as the main raw materials. Effect of MgAl-HTlcs Content on Structure and Properties of Composite Materials. TEM images show that MgAl-HTlcs disperse evenly in the nanocomposite. When the content of MgAl-HTlcs is 1.0wt% (mass fraction of MgAl-HTlcs and CL), some lamellar delaminated hydrotalcite . The result of UV spectrum shows that MgAl-HTlcs dispersed in a small amount compared with pure nylon 6 can make the composites absorb UV light with the wavelength of near 320 ~ 380nm. XRD and DSC results showed that a small amount of uniformly dispersed MgAl-HTlcs played a good role as heterogeneous nucleating agent for nylon 6, which not only increased the crystallization temperature but also increased the crystallinity. Thermogravimetric analysis shows that the thermal stability of the composites is obviously enhanced by the partial delamination of MgAl-HTlcs.