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首页> 外文期刊>Journal of Applied Polymer Science >Influence of organic modification on mechanical properties of melt processed intercalated poly(methyl methacrylate)-organoclay nanocomposites
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Influence of organic modification on mechanical properties of melt processed intercalated poly(methyl methacrylate)-organoclay nanocomposites

机译：有机改性对熔融加工插层聚甲基丙烯酸甲酯-有机粘土纳米复合材料力学性能的影响

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摘要

The influence of organic modifiers on intercalation extent, structure, thermal and mechanical properties of poly(methyl methacrylate) (PMMA)-clay nanocomposites were studied. Two different organic modifiers with varying hydrophobicity (single tallow versus ditallow) were investigated. The nanocomposites were prepared from melt processing method and characterized using wide angle X-ray diffraction, transmission electron microscopy, thermogravimetric analysis, differential scanning calorimetry (DSC), and tensile tests. Mechanical properties such as tensile modulus (E), break stress (sigma(brk)), and 0% break strain (epsilon(brk)) were determined for nanocomposites at various clay loadings. Extent of PMMA intercalation is sufficient and in the range 9-15 angstrom depending on organoclay and filler loading. Overall thermal stability of nanocomposites increases by 16-30 degrees C. The enhancement in T-g of nanocomposite is merely by 2-4 degrees C. With increase in clay loading, tensile modulus increases linearly while % break strain decreases. Break stress is found to increase till 4 wt % and further decreases at higher clay loadings. The overall improvement in thermal and mechanical properties was higher for the organoclay containing organic modifier with lower hydrophobicity and single tallow amine chemical structure. (c) 2007 Wiley Periodicals, Inc.
机译：研究了有机改性剂对聚甲基丙烯酸甲酯（PMMA）-粘土纳米复合材料的插层程度，结构，热力学性能的影响。研究了两种具有不同疏水性的不同​​有机改性剂（单牛脂与二牛脂）。纳米复合材料是通过熔融加工方法制备的，并使用广角X射线衍射，透射电子显微镜，热重分析，差示扫描量热法（DSC）和拉伸试验进行了表征。确定了各种粘土含量下纳米复合材料的机械性能，例如拉伸模量（E），断裂应力（sigma（brk））和0％断裂应变（epsilon（brk））。取决于有机粘土和填料的负载量，PMMA插层的程度足够，范围在9-15埃之间。纳米复合材料的整体热稳定性提高了16-30摄氏度。纳米复合材料的T-g升高仅2-4摄氏度。随着粘土含量的增加，拉伸模量线性增加，而断裂应变百分比降低。发现断裂应力增加直至4wt％，并在较高粘土负载下进一步减小。对于包含具有较低疏水性和单牛脂胺化学结构的有机改性剂的有机粘土，热和机械性能的总体改善较高。 （c）2007年Wiley Periodicals，Inc.

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