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Mechanical Properties of Polycarbonate and Poly(Methyl Methacrylate) Films Reinforced with Surface-Functionalized Nanodiamonds

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Polymer nanocomposites (PNCs) possess highly versatile characteristics, depending on the nanofiller properties such as its chemical composition, particle size, dimension, polydispersity, concentration, or surface functional groups. In comparison with micron-sized materials, the nanofiller having a large surface area facilitates stronger interaction with the matrix. In this work, various surface-functionalized nanodiamonds (sf-NDs) having hydroxyl, carboxyl, amino, and amide group were prepared, and dispersed into polycarbonate (PC) and poly(methyl methacrylate) (PMMA) polymers. The polymer nanocomposites (PNCs) which contain the ND content of 5 wt% were subjected to the measurements of mechanical properties such as hardness and Young's modulus by atomic force microscopy (AFM) nanoindentation. It was observed that the hardness and Young's modulus of the polymer nanocomposites depend on strongly the nature of functional groups. The amine or amide functionalization gives the high mechanical properties for both polymers. The interfacial interaction between sf-NDs and polymer matrices is an important factor determining the mechanical properties of the PNCs.
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Document Type: Research Article

Publication date: January 1, 2011

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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