<abstract xmlns="http://www.w3.org/1999/xhtml"><p>In this research, polyurethane (PU)/tetraethyl orthosilicate (TEOS) composite was prepared via one-step polymerization method using different concentrations of TEOS in PU. The structural, optical and physical properties of PU composite were characterized by SEM imaging, FT-IR spectroscopy, water uptake, Raman spectroscopy and optical microscopy imaging of synthesized samples. The SEM results showed that by adding TEOS to the PU, the cell and window size of synthesized samples decreased. This result was also observed in the optical micrographs. The bonding characteristics of PU/TEOS composites were analyzed using Raman and FT-IR spectra. According to the FT-IR spectra, the degree of phase separation (DPS) and hydrogen bonding index, R, in 800 μl TEOS/PU had the highest R and DPS factors. By adding different concentrations of TEOS to PU, the apparent density decreased but the real density increased. The total, open and closed porosity of the synthesized samples were calculated. At low loading of TEOS in PU, the open porosity of the samples increased. The PU/TEOS composites may be promising candidates for absorbing sound.</p></abstract>

In this research, polyurethane (PU)/tetraethyl orthosilicate (TEOS) composite was prepared via one-step polymerization method using different concentrations of TEOS in PU. The structural, optical and physical properties of PU composite were characterized by SEM imaging, FT-IR spectroscopy, water uptake, Raman spectroscopy and optical microscopy imaging of synthesized samples. The SEM results showed that by adding TEOS to the PU, the cell and window size of synthesized samples decreased. This result was also observed in the optical micrographs. The bonding characteristics of PU/TEOS composites were analyzed using Raman and FT-IR spectra. According to the FT-IR spectra, the degree of phase separation (DPS) and hydrogen bonding index, R, in 800 μl TEOS/PU had the highest R and DPS factors. By adding different concentrations of TEOS to PU, the apparent density decreased but the real density increased. The total, open and closed porosity of the synthesized samples were calculated. At low loading of TEOS in PU, the open porosity of the samples increased. The PU/TEOS composites may be promising candidates for absorbing sound.

Evaluation of structural, optical and physical properties of polyurethane composites doped with metal alkoxides

Department of Physics, Faculty of Science

Shahid Rajaee Teacher Training University

Materials Science-Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

In this research, polyurethane (PU)/tetraethyl orthosilicate (TEOS) composite was prepared via one-step polymerization method using different concentrations of...

Evaluation of structural, optical and physical properties of polyurethane composites doped with metal alkoxides

Published Online: Dec 12, 2020

Page range: 416 - 423

Received: Aug 13, 2018

Accepted: Mar 06, 2019

DOI: https://doi.org/10.2478/msp-2020-0048

Keywords
polyurethane, FT-IR spectroscopy, Raman spectroscopy, porosity, density, SEM analysis

© 2020 Marzieh Nadafan et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Evaluation of structural, optical and physical properties of polyurethane composites doped with metal alkoxides

Published Online: Dec 12, 2020

Page range: 416 - 423

Received: Aug 13, 2018

Accepted: Mar 06, 2019

DOI: https://doi.org/10.2478/msp-2020-0048

Keywordspolyurethane, FT-IR spectroscopy, Raman spectroscopy, porosity, density, SEM analysis

© 2020 Marzieh Nadafan et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Keywords
polyurethane, FT-IR spectroscopy, Raman spectroscopy, porosity, density, SEM analysis