In-Situ polymerization and characterization of polyurethane-urea/diamond nanocomposites

  • Meisam Barikani Department of Polymer Engineering, Tehran South Branch, Islamic Azad University, Tehran
  • Mohammad Reza Kalaee Department of Polymer Engineering, Tehran South Branch, Islamic Azad University, Tehran, Iran.
  • Saeedeh Mazinani Amirkabir Nano Technology Research Institute, Amirkabir University of Technology, Tehran, Iran.
  • Mehdi Barikani Department of Polyurethane, Faculty of Science. Iran Polymer and Petrochemical Institute, Tehran, Iran.
Keywords: Polyurethane-urea, nanodiamond, , nanocomposite, Synthesis, Characterization


AbstractNanodiamond as a nanoparticle has been widely used in different applications including polymer nanocomposites due to its excellent properties. For this purpose it is utilized to apply and study the effect of nanodiamond in polyurethane–urea matrix.Polyurethane-urea/diamond nanocomposites were prepared using polycaprolactone diol, 4, 4′-methylene bis (cyclohexyl) diisocyanate, methylene ortochloroaniline and diamond nanoparticles. The molecular structure of the polymer nanocomposites and dispersion of nanodiamonds were characterized and studied by FTIR and, 1HNMR spectroscopy, X-ray diffraction, Scanning electron microscopy, and Transmission electron microscopy. Disappearance of isocyanate NCO peak measured by FTIR spectroscopy and formation of NH bond measured by NMR spectroscopy confirmed completion of the reaction and polymer formation. Micrographs of SEM & TEM showed reasonable dispersion of nanoparticles throughout the polymer matrix, especially in lower percentage of nanodiamond particles. This may be explained by evidence of functional groups on the surface of nano diamond which suggests good interaction with polymer matrix. Agglomeration of nanodiamond particles is also observed by scanning and transmission electron microscope which are ascribed to the high surface free energy of nanodiamond particles and increased by increasing the amount of nanodiamond in polyurethane-urea matrix. DSC and TGA analysis also showed improvement in thermal property.



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