Dynamic mechanical and thermal analysis of aligned vapor grown carbon nanofiber reinforced polyethylene |
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| Affiliation: | 1. University College London, School of Pharmacy, 29-39 Brunswick Square, London WC1N 1AX, UK;2. Department of Mechanical Engineering, University College London, Torrington Place, London WC1E 7JE, UK;1. University Center for Energy Efficient Buildings (UCEEB), Czech Technical University in Prague, Třinecká 1024, 273 43, Buštěhrad, Czech Republic;2. Laboratory of Tissue Engineering, Institute of Experimental Medicine, Czech Academy of Sciences, Vídeňská 1083, 142 40 Prague, Czech Republic;3. Department of Cell Biology, Faculty of Science, Charles University, Albertov 6, 128 43 Prague, Czech Republic;4. Institute of Biophysics, 2nd Faculty of Medicine, Charles University in Prague, V Uvalu 84, Prague 5-Motol 150 06, Czech Republic;5. Laboratory of Biomechanics, Faculty of Mechanical Engineering, Czech Technical University in Prague, Prague 6, Czech Republic;6. InoCure s.r.o., Politických vězňů 935/13, Prague 1, Czech Republic |
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| Abstract: | Dynamic mechanical and thermal analysis of aligned vapor grown carbon-nanofibers (VGCNFs)-reinforced high-density polyethylene (HDPE) was performed. High-shear mixing was used to disperse and distribute the nanofibers. Extensional flow was used to obtain anisotropic nanoreinforced composite tapes. Dynamic mechanical analysis showed dual increase of storage modulus and loss modulus with different draw ratios. The modulus and complex viscosities of the drawn samples converged to that of pure PE at high temperatures, indicating that in the melt, the behavior is dominated by the semicrystalline matrix. Additionally, an increase in thermal stability was observed for the composites compared to PE matrix. Differential scanning calorimetry analysis showed that the inclusion of nanofibers hindered the structure evolution of PE upon drawing. |
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