High throughput methods for polymer nanocomposites research: Extrusion, NMR characterization and flammability property screening |
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| Authors: | J. W. Gilman S. Bourbigot J. R. Shields M. Nyden T. Kashiwagi R. D. Davis D. L. Vanderhart W. Demory C. A. Wilkie A. B. Morgan J. Harris R. E. Lyon |
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| Affiliation: | (1) Fire Research Division, National Institute of Standards and Technology, Gaithersburg, MD, USA;(2) Laboratoire de Génie et Matériaux Textiles (GEMTEX), Ecole Nationale des Arts et Industries Textiles (ENSAIT), ROUBAIX, France;(3) Polymers Division, National Institute of Standards and Technology, Gaithersburg, MD, USA;(4) Department of Chemistry, Marquette University, Milwaukee, WI, USA;(5) Corporate R&D, The Dow Chemical Co., Midland, MI, USA |
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| Abstract: | A large number of parameters influence polymer-nanocomposite performance and developing a detailed understanding of these materials involves investigation of a large volume of the associated multi-dimensional property space. This multi-dimensional parameter space for polymer-nanocomposites consists of the obvious list of different material types under consideration, such as  polymer and nano-additive, but also includes interphase surface chemistry, and processing conditions. This article presents combinatorial library design and high-throughput screening methods for polymer nanocomposites intended as flame-resistant materials. Here, we present the results of using a twin-screwn extruder to create composition-gradient library strips of polymer nanocomposites that are screened with a solid-state NMR method to rapidly evaluate the optimal processing conditions for achieving nanocomposite dispersion. In addition, we present a comparison of a new rapid Cone calorimetry method to conventional Cone calorimetry and to the gradient heat-flux flame spread method. |
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