Probing the role of surface treated montmorillonite on the properties of semi-aromatic polyamide/clay nanocomposites
Probing the role of surface treated montmorillonite on the properties of semi-aromatic polyamide/clay nanocomposites
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DOI：
10.1016/j.apsusc.2008.06.184
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发表时间：
2008-12
影响因子：
6.7
通讯作者：
S. Zulfiqar;Ayesha Kausar;M. Rizwan;M. Sarwar
中科院分区：
文献类型：
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作者：
S. Zulfiqar;Ayesha Kausar;M. Rizwan;M. Sarwar
通过溶液共混技术生成半芳香族聚酰胺/有机粘土纳米复合材料。用对氨基苯甲酸对蒙脱石粘土进行表面改性，以使其与聚酰胺基质充分相容。聚合物链由 4-氨基苯砜与癸二酰氯缩合产生。通过在反应接近完成时使用 1% 剩余二胺用胺端基修饰聚合物链，建立两相之间的相互作用。利用 X 射线衍射 (XRD)、透射电子显微镜 (TEM)、薄膜拉伸测试、差示扫描量热法 (DSC)、热重分析 (TGA) 和吸水率测量研究了粘土分散体以及粘土和聚酰胺链之间的相互作用对纳米复合材料性能的影响。结构研究证实了在低粘土含量下形成分层纳米结构，在较高粘土含量下形成无序插层形态。纳米复合材料的这种形态导致其机械和热性能增强。随着有机粘土在聚酰胺基体中分散性的增加，拉伸行为和热稳定性显着增强，而渗透性降低。
Semi-aromatic polyamide/organoclay nanocomposites were generated through solution blending technique. Surface modification of the montmorillonite clay was performed with p-amino benzoic acid for ample compatibilization with the polyamide matrix. The polymer chains were produced from the condensation of 4-aminophenyl sulfone with sebacoyl chloride. Interaction between the two phases was established by modifying the polymer chains with amine end groups using 1% surplus diamine near the completion of the reaction. The effect of clay dispersion and the interaction between clay and polyamide chains on the properties of nanocomposites were investigated using X-ray diffraction (XRD), transmission electron microscopy (TEM), tensile testing of thin films, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and water uptake measurements. The structural investigations confirmed the formation of delaminated nanostructures at low clay contents and disordered intercalated morphology at higher clay loadings. This morphology of the nanocomposites resulted in their enhanced mechanical and thermal properties. The tensile behavior and thermal stability significantly amplified while permeability decreased with increasing dispersibility of organoclay in the polyamide matrix.