Analysis of energy transfer and ternary non-covalent filler/matrix/UV stabilizer interactions in carbon nanofiber and oxidized carbon nanofiber filled poly(methyl methacrylate) composites


Gunes I. S. , Perez-Bolivar C., Jimenez G. A. , ÇELİKBIÇAK Ö. , Li F., Anzenbacher P., ...Daha Fazla

POLYMER, cilt.52, sa.23, ss.5355-5361, 2011 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 52 Konu: 23
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1016/j.polymer.2011.09.011
  • Dergi Adı: POLYMER
  • Sayfa Sayıları: ss.5355-5361

Özet

Ternary non-covalent interactions between carbon nanofibers (CNFs), oxidized carbon nanofibers (ox-CNFs), poly(methyl methacrylate) (PMMA) chains, and benzotriazole-containing UV stabilizers were analyzed using Fourier-transform infra red spectroscopy (FTIR), time-resolved fluorescence emission spectroscopy, and fluorescence lifetime imaging microscopy. The results indicated that PMMA chains form hydrogen bonds both with ox-CNF fibers and the UV stabilizer molecules. It was also determined that UV stabilizers strongly interact with CNF particles via pi-pi interactions. The extent of pi-pi and hydrogen bonding interactions was determined to be lower between ox-CNF particles and UV stabilizers due to less perfect graphitic structure of the former. The morphology of the composites indicated that the hydrogen bonds between PMMA chains and ox-CNF particles resulted in highly improved state of filler dispersion in ox-CNF/PMMA composites. (C) 2011 Elsevier Ltd. All rights reserved.