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Ag-Nylon Nanocomposites by Dynamic Emulsion Polycondensation

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Abstract

The present work demonstrates a novel technique for dispersing nanofillers in a thermoplastic polymer, where polymerization and dispersion of the nanofillers occur simultaneously via dynamic emulsion polycondensation at ambient temperature. The composite is manufactured in the form of a uniform powder, which can then be molded into desired shape by melting or sintering. The technique is demonstrated for Ag nanowire / Nylon 66 composites. In this demonstration, Ag nanowires are synthesized by the polyol process. Polyvinylprrolidone (PVP) is used to functionalize the Ag nanowires. Nanocomposites with varying Ag content are prepared and investigated. The nanowires are found to be monodispersed and hydrogen-bonded to the Nylon 66 matrix through PVP. Glass transition temperature of the composites decreases from 61 to 48 °C with Ag weight fraction increasing from 0 to 6.47%. The depression of the glass transition temperature is owed to the plasticizer effect as well as heterogeneous nucleation effect of the nanowires for polymerization leading to shorter chain length.

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Authors and Affiliations

  1. Functional Nanomaterials Laboratory, Department of Mechanical and Aerospace Engineering, Oklahoma State University, Stillwater, OK, 74078, USA

    Linqi Zhang, Sriharsha Karumuri & A. Kaan Kalkan

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  1. Linqi Zhang
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  2. Sriharsha Karumuri
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  3. A. Kaan Kalkan
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Zhang, L., Karumuri, S. & Kalkan, A.K. Ag-Nylon Nanocomposites by Dynamic Emulsion Polycondensation. MRS Advances 1, 2519–2524 (2016). https://doi.org/10.1557/adv.2016.419

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