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首页> 外文期刊>Journal of Applied Polymer Science >Thermal and mechanical properties of a polypropylene nanocomposite
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Thermal and mechanical properties of a polypropylene nanocomposite

机译：聚丙烯纳米复合材料的热和机械性能

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An experimental polypropylene (PP) nanocomposite, containing approximately 4 wt % of an organophilic montmorillonite clay, was prepared and characterized, and its properties were compared with those of talc-filled (20-40 wt %) compositions. Weight reduction, with maintained or even improved flexural and tensile moduli, especially at temperatures up to 70degreesC, was a major driving force behind this work. By a comparison with the analytical data from a nylon 6 (PA-6) nanocomposite, it was found that the PP nanocomposite contained well-dispersed, intercalated clay particles; however, X-ray diffraction, transmission electron microscopy, dynamic mechanical analysis, and permeability measurements confirmed that exfoliation of the clay in PP was largely absent. The increased glass-transition temperature (T-g) of a PA-6 nanocomposite, which possessed fully exfoliated particles, indicated the molecular character of the matrix-particle interaction, whereas the PP nanocomposite exhibited simple matrix-filler interactions with no increase in T-g The PP nanocomposite exhibited a weight reduction of approximately 12% in comparison with the 20% talc-filled PP, while maintaining comparable stiffness. Undoubtedly, considerable advantages may be available if a fully exfoliated PP nanocomposite is fabricated; however, with the materials available, a combination of talc, or alternative reinforcements, and nanocomposite filler particles may provide optimum performance. (C) 2003 Wiley Periodicals, Inc. [References: 16]
机译：制备并表征了包含约4 wt％的亲有机蒙脱土的实验聚丙烯（PP）纳米复合材料，并将其性能与滑石粉填充的（20-40 wt％）组合物的性能进行了比较。减轻重量，保持甚至改善弯曲和拉伸模量，尤其是在高达70摄氏度的温度下，是减轻这项工作的主要动力。通过与尼龙6（PA-6）纳米复合材料的分析数据进行比较，发现PP纳米复合材料包含分散良好的插层粘土颗粒。然而，X射线衍射，透射电子显微镜，动态力学分析和渗透率测量证实，聚丙烯中几乎没有粘土的剥落。具有完全剥落颗粒的PA-6纳米复合材料的玻璃化转变温度（Tg）升高，表明基质-颗粒相互作用的分子特征，而PP纳米复合材料表现出简单的基质-填料相互作用而Tg却没有增加。与填充有20％滑石粉的PP相比，纳米复合材料的重量减轻了约12％，同时保持了相当的刚度。毫无疑问，如果制造出完全剥落的PP纳米复合材料，则可以获得相当大的优势。但是，使用现有材料时，滑石粉或其他增强材料与纳米复合填料颗粒的组合可提供最佳性能。 （C）2003 Wiley Periodicals，Inc. [参考：16]

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