Polyamide-6/organointercalated zirconium phosphate nanocomposites (PA-6/ZrPOct) were prepared by melt extrusion. The synthesized lamellar ZrP was expanded with octadecylamine at different amine:phosphate ratio, and its influence was evaluated by tensile test, melt flow rate, water absorption, rheology, scanning electron microscopy, and wide-angle X-ray diffraction. For all nanocomposites, the increase of modulus and decrease of elongation at rupture were observed. The decrease in water uptake was observed as the amine/phosphate increase, indicating that the presence of the amine reduces the hydrophilic nature of PA-6. Rheology revealed by pseudoplasticity indices that the nanofillers dispersion was homogeneous in all nanocomposites. Wide-angle X-ray diffractometry analysis showed that the characteristic basal spacing peak of pristine ZrP was absent for ZrOct 1:1 and 2:1. Also a high decrease in crystallinity was observed for PA-6/ZrOct 2:1 sample, which would be associated to plasticizing effect of octadecylamine avoiding crystallites formation. Evidences showed that structures with different degrees of intercalation and/or exfoliation could have been achieved.

中文翻译：

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聚酰胺 6/磷酸锆纳米复合材料的耐水性、机械和形态特征

聚酰胺-6/有机插层磷酸锆纳米复合材料（PA-6/ZrPOct）是通过熔融挤出制备的。合成的层状ZrP在不同胺：磷酸盐比例下用十八胺膨胀，并通过拉伸试验、熔体流动速率、吸水率、流变学、扫描电子显微镜和广角X射线衍射评估其影响。对于所有纳米复合材料，均观察到模量增加和断裂伸长率降低。随着胺/磷酸盐的增加，观察到吸水量减少，表明胺的存在降低了 PA-6 的亲水性。假塑性指数表明纳米填料分散在所有纳米复合材料中都是均匀的。广角 X 射线衍射分析表明，对于 ZrOct 1:1 和 2:1，原始 ZrP 的特征基底间距峰不存在。还观察到 PA-6/ZrOct 2:1 样品的结晶度大幅下降，这与十八胺的增塑作用避免了微晶形成有关。有证据表明，可以实现具有不同程度嵌入和/或剥落的结构。