Synthesis, Characterization and Study of Thermal Properties of New Silicone Polymers and Their Nanocomposites

Authors

  • Thikra A. Naif Department of Chemistry, College of Education for Pure Science Ibn Al-Haitham, University of Baghdad, Baghdad, Iraq
  • Basma J. Ahmed Department of Chemistry, College of Education for Pure Science Ibn Al-Haitham, University of Baghdad, Baghdad, Iraq https://orcid.org/0000-0003-3785-5566

DOI:

https://doi.org/10.21123/bsj.2024.10810

Keywords:

Dichlorodimethylsilane, Nanocomposite, Silicone polymer, Silver nanoparticles, Thermal analysis.

Abstract

This study aims to synthesize a new class of silicon polymers P1-P4 were synthesized based on dichlorodimethylsilane (DCDMS) with some organic compounds containing terminal hydroxyl groups were synthesized  for the first time[M1-M4] via condensation polymerization  .Also, their nanocomposites P′1-P′4 were prepared in the presence of 0.7% the   silver nanoparticles (Ag-NPs) using the solution casting method. The structures of all monomers and polymers   were characterized by FTIR and 1H-NMR spectroscopy, which allowed to identify functional groups of monomers and silicone polymers. Thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) test were performed to analyze thermal behavior and effect of the presence of silver nanoparticles. The results of thermal analysis showed that the presence of phenyl rings demonstrated the thermal stability of pure silicon polymers, and the introduction of silver nanoparticles of 7% weight showed an improvement in the thermal performance of nanocomposites P′1-P′4 compared to pure silicon polymers. Which means that the temperature for weight loss (TGA) was higher for the most nanocomposite P′1-P′4, where the TGA for polymers increased from 127 for polymer P2 to 196 for its nanocomposite P′2, this may be due to filling the free voids between the Polymerized chains by silver nanoparticles.  The silver nanoparticles were characterized and analyzed using X-ray diffraction XRD and scanning electron microscopy. The X-ray study showed the presence of silver nanoparticles and the average size of nanoparticles ranged from 20 -30 nanometers. The surface study was performed using scanning electron microscopy which showed a fairly uniform shape for the silver nanocomposites.

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Synthesis, Characterization and Study of Thermal Properties of New Silicone Polymers and Their Nanocomposites. Baghdad Sci.J [Internet]. [cited 2024 Nov. 7];22(5). Available from: https://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/10810