Glass transition broadening via nanofiller-contiguous polymer network in aromatic thermosetting copolyester nanocomposites


Bakir M., Meyer J. L., Sutrisno A., Economy J., Jasiuk I.

Journal of Polymer Science, Part B: Polymer Physics, vol.56, no.24, pp.1595-1603, 2018 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 56 Issue: 24
  • Publication Date: 2018
  • Doi Number: 10.1002/polb.24747
  • Journal Name: Journal of Polymer Science, Part B: Polymer Physics
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1595-1603
  • Keywords: aromatic thermosetting copolyester, glass transition temperature, interfacial covalent conjugation, nanocomposites, nanofiller-contiguous polymer network
  • Ankara Yıldırım Beyazıt University Affiliated: No

Abstract

The glass transition is a genuine imprint of temperature-dependent structural relaxation dynamics of backbone chains in amorphous polymers, which can also reflect features of chemical transformations induced in macromolecular architectures. Optimization of thermophysical properties of polymer nanocomposites beyond the state of the art is contingent on strong interfacial bonding between nanofiller particles and host polymer matrix chains that accordingly modifies glass transition characteristics. Contemporary polymer nanocomposite configurations have demonstrated only marginal glass transition temperature shifts utilizing conventional polymer matrix and functionalized nanofiller combinations. We present nanofiller-contiguous polymer network with aromatic thermosetting copolyester nanocomposites in which carbon nanofillers covalently conjugate with cure advancing crosslinked backbone chains through functional end-groups of constituent precursor oligomers upon an in situ polymerization reaction. Via thoroughly transformed backbone chain configuration, the polymer nanocomposites demonstrate unprecedented glass transition peak broadening by about 100 °C along with significant temperature upshift of around 80 °C. © 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2018, 56, 1595–1603.