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
POLYMER, cilt.52, sa.23, ss.5355-5361, 2011 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 52 Sayı: 23
- Basım Tarihi: 2011
- Doi Numarası: 10.1016/j.polymer.2011.09.011
- Dergi Adı: POLYMER
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.5355-5361
- Anahtar Kelimeler: Nanocomposites, Noncovalent interactions, Carbon nanofiber, STYRENE-ACRYLIC-ACID, ULTRAVIOLET STABILIZERS, NANOCOMPOSITES, POLYMERS, SOLVENT, BLENDS, PMMA
- Hacettepe Üniversitesi Adresli: Evet
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.