GOALI: Mechanical and Molecular Behavior of Nanoparticulate/Polymer Composites

摘要 9871894，Schadler/RPI 最近的工作表明，模量，应变破坏，和强度的聚合物复合材料可以同时增加与纳米粒子填料。 这在微米尺寸的填充系统中未观察到。 该提案具有双重目标：1）创建和研究用于工程应用的新型纳米填料/聚合物复合材料; 2）通过了解颗粒分散、颗粒结构和表面化学以及聚合物链刚度对结合聚合物层的尺寸和机械性能的影响，对它们的结构-性能关系进行基本了解。 纳米粒子填料将使用气体冷凝法合成。 通过该方法将合成尺寸（直径）在5-50 nm范围内的各种金属、陶瓷和复合纳米颗粒。 此外，纳米颗粒可以被涂覆以改性其表面。 纳米填料/聚合物复合材料将使用弹性体、热塑性塑料和热固性材料制备。 微观结构表征将使用各种技术进行，如TEM、SEM和X射线衍射。 纳米颗粒对周围聚合物区域的影响将用于在更宏观的尺度上确认NMR观察结果。 显微拉曼光谱将被用来获得微（纳米）机械行为的理解。 这些新的复合材料的测量机械性能将与现有的纤维和颗粒填充复合材料进行比较。 本研究对高模量、高强度聚合物复合材料的制备具有重要意义。 对纳米复合材料的制造和测试的研究将补充RPI关于纳米材料的教育计划。 这个项目的结果从一个建议提交响应NSF 98-20，在纳米技术的合作伙伴关系：合成，加工和利用功能纳米结构（FNS）。

Abstract 9871894, Schadler/RPI Recent work has shown that the modulus, strain to failure, and strength of polymer composites can be increased simultaneously with nanosized particle filler. This is not observed in micron sized filled systems. This proposal has dual objectives: 1) to create and investigate novel nanofiller/polymer composites for engineering application sand 2) to develop a fundamental understanding of their structure-property relationships through understanding the effects of particle dispersion, particle structure and surface chemistry, and polymer chain stiffness on the size of the bound polymer layer and on the mechanical properties. Nanoparticle fillers will be synthesized using the gas condensation method. A wide range of metal, ceramic, and composite nanoparticles will be synthesized in the size (diameter) range of 5-50 nm by this method. In addition, the nanoparticles can be coated to modify their surfaces. Nanofiller/polymer composites will be prepared using elastomers, thermoplastics, and thermosets. Microstructural characterization will be done using a variety of techniques such as TEM, SEM and X-ray diffraction. The effect of the nanoparticle on the surrounding polymer region will be used to confirm the NMR observations on a more macroscopic scale. Micro-Raman spectroscopy will be used to gain an understanding of the micro(nano)mechanical behavior. The measured mechanical properties of these new composites will be compared with those of existing fiber and particle filled composites. This research is relevant to fabrication of high modulus, high strength polymer composites. Research on the fabrication and testing of nanocomposites will complement an educational initiative at RPI on nanomaterials. This project results from a proposal submitted in response to NSF 98-20, Partnership in Nanotechnology: Synthesis, Processing, and Utilization of Functional Nanostructures (FNS).