Calorimetric and Dielectric Study of Renewable Poly(hexylene 2,5-furan-dicarboxylate)-Based Nanocomposites In Situ Filled with Small Amounts of Graphene Platelets and Silica Nanoparticles.
作者： Olawale Monsur Sanusi , Lazaros Papadopoulos , Panagiotis A. Klonos , Zoi Terzopoulou , Nourredine Aït Hocine
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摘要: Poly(hexylene 2,5 furan-dicarboxylate) (PHF) is a relatively new biobased polyester prepared from renewable resources, which targeted for use in food packaging applications, owing to its great mechanical and gas barrier performance. Since both properties are strongly connected crystallinity, the latter enhanced here by situ introduction PHF of graphene nanoplatelets fumed silica nanoparticles, as well mixtures both, at low amounts. For this investigation, we employed Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), X-ray diffraction (XRD) dielectric (BDS). The fillers were found improve crystallization rate (increasing Tc) fraction (CF), was rationalized via concept acting agents. This action stronger case compared silica. BDS allowed detection local segmental dynamics, particular first time. glass transition dynamics (α relaxation) DSC (Tg) mainly dominated high CF, whereas filled uniquely with strong spatial confinement effects due crystals revealed. Finally, all samples demonstrated segmental-like above Tg, screens global chain (normal mode).
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