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首页> 外文期刊>Polymer Composites >Effect of Clay Modification on the Morphological, Mechanical, and Thermal Properties of Polyamide 6/Polypropylene/Montmorillonite Nanocomposites
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Effect of Clay Modification on the Morphological, Mechanical, and Thermal Properties of Polyamide 6/Polypropylene/Montmorillonite Nanocomposites

机译：粘土改性对聚酰胺6 /聚丙烯/蒙脱土纳米复合材料的形态，机械和热学性能的影响

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摘要

Polyamide 6/polypropylene (PA6/PP = 70/30 parts) blends containing 4 phr (parts per hundred resin) of organophilic montmorillonite (OMMT) were prepared by melt compounding. The sodium montmorillonite (Na-MMT) was modified using three different types of alkyl ammonium salts, namely dodecylamine, 12-aminolauric acid, and stearylamine. The effect of clay modification on the morphological and mechanical properties of PA6/PP nanocomposites was investigated using x-ray diffraction (XRD), transmission electron microscopy (TEM), tensile, flexural, and impact tests. The thermal properties of PA6/PP nanocomposites were characterized using thermogravimetric analysis (TGA), dynamic mechanical analysis (DMA), and heat distortion temperature (HDT). XRD and TEM results indicated the formation of exfoliated structure for the PA6/ PP nanocomposites prepared using stearylamine modified montmorillonite. On the other hand, a mixture of intercalated and exfoliated structures was found for the PA6/PP nanocomposites prepared using 12-aminolauric acid and dodecylamine modified montmorillonite. Incorporation of OMMT increased the stiffness but decreased the ductility and toughness of PA6/PP blend. The PA6/PP nanocompo-site containing stearylamine modified montmorillonite showed the highest tensile, flexural, and thermal properties among all nanocomposites. This could be attributed to better exfoliated structure in the PA6/PP nanocompo-site containing stearylamine modified montmorillonite. The storage modulus and HDT of PA6/PP blend were increased significantly with the incorporation of both Na-MMT and OMMT. The highest value in both storage modulus and HDT was found in the PA6/PP nanocompo-site containing stearylamine modified montmorillonite due to its better exfoliated structure.
机译：通过熔融混合制备含有4phr（份/百份树脂）亲有机蒙脱土（OMMT）的聚酰胺6 /聚丙烯（PA6 / PP ＝ 70/30份）共混物。使用三种不同类型的烷基铵盐（即十二烷基胺，12-氨基月桂酸和硬脂胺）对蒙脱土钠（Na-MMT）进行了改性。使用X射线衍射（XRD），透射电子显微镜（TEM），拉伸，弯曲和冲击试验研究了粘土改性对PA6 / PP纳米复合材料的形态和机械性能的影响。使用热重分析（TGA），动态力学分析（DMA）和热变形温度（HDT）表征PA6 / PP纳米复合材料的热性能。 XRD和TEM结果表明，使用硬脂胺改性的蒙脱土制备的PA6 / PP纳米复合材料的剥离结构形成。另一方面，对于使用12-氨基月桂酸和十二烷基胺改性的蒙脱土制备的PA6 / PP纳米复合材料，发现了插层和剥离结构的混合物。 OMMT的加入增加了PA6 / PP共混物的刚度，但降低了其延展性和韧性。含有硬脂胺改性的蒙脱石的PA6 / PP纳米复合材料在所有纳米复合材料中显示出最高的拉伸，弯曲和热性能。这可以归因于在含有硬脂胺改性的蒙脱石的PA6 / PP纳米复合材料中更好的剥离结构。随着Na-MMT和OMMT的引入，PA6 / PP共混物的储能模量和HDT显着增加。由于其更好的剥落结构，在含有硬脂胺改性的蒙脱石的PA6 / PP纳米复合位点中发现储能模量和HDT均最高。

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