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首页> 外文期刊>Journal of Applied Polymer Science >PA6/Clay Nanocomposites by Continuous Sonication Process
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PA6/Clay Nanocomposites by Continuous Sonication Process

机译：连续超声处理PA6 /粘土纳米复合材料

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Polyamide 6 (PA6)/clay nanocomposites were prepared using a single screw extruder with an ultrasonic die attachment. The die pressure and ultrasonic power consumption were measured at various clay concentrations. The structure and morphology of nanocomposites studied by X-ray diffraction (XRD) and transmission electron microscopy (TEM) indicated that the clay (Cloisite (R) 30B) was exfoliated within PA6 matrix at all clay concentrations, while clays (Cloisite (R) 15A and 93A) only intercalated. The complex viscosities of the nanocomposites were increased with clay loading and after ultrasonic treatment at lower amplitudes. The Young's modulus, stress and elongation at break, toughness and yield stress and strain of ultrasonically treated nanocomposites were significantly affected by the level of intensity of ultrasound. In addition to XRD, differential scanning calorimetry (DSC) and N-15 NMR techniques were used to investigate the structural changes in PA6/clay nanocomposites. The results indicated that the intercalated organoclay nanocomposites can induce generation of the gamma-form crystal of PA6 and substantially affect the arrangement of molecules in the alpha-form crystal. It was found that the addition of clay in the PA6 matrix leads to a decrease of crystallinity. However, ultrasonic treatment of nanocomposites increased crystallinity. A substantial reduction in oxygen permeability was observed by increasing concentration of clay.
机译：使用具有超声模头附件的单螺杆挤出机制备聚酰胺6（PA6）/粘土纳米复合材料。在各种粘土浓度下测量模头压力和超声功率消耗。通过X射线衍射（XRD）和透射电子显微镜（TEM）研究的纳米复合材料的结构和形态表明，在所有粘土浓度下，粘土（Cloisite（R）30B）都在PA6基质中剥落，而粘土（Cloisite（R）） 15A和93A）仅插入。纳米复合材料的复数粘度随粘土含量的增加以及超声处理后以较低的幅度增加。超声强度对纳米复合材料的杨氏模量，断裂伸长率，韧性，屈服应力和应变有显着影响。除XRD外，还使用差示扫描量热法（DSC）和N-15 NMR技术研究PA6 /粘土纳米复合材料的结构变化。结果表明，插入的有机粘土纳米复合材料可诱导PA6的伽马型晶体生成，并实质上影响α型晶体中分子的排列。发现在PA6基体中添加粘土导致结晶度降低。然而，超声处理纳米复合材料增加了结晶度。通过增加粘土的浓度可以观察到透氧性的显着降低。

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