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Photoluminescence of epoxy/clay nanocomposites
Author(s) -
Mondragón Margarita,
Cortes Miguel Angel,
Arias Eduardo,
Falcony Ciro,
ZelayaAngel Orlando
Publication year - 2011
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.21970
Subject(s) - materials science , epoxy , nanocomposite , montmorillonite , photoluminescence , fourier transform infrared spectroscopy , polymer , agglomerate , polymer nanocomposite , composite material , chemical engineering , halloysite , quenching (fluorescence) , polymer chemistry , physics , optoelectronics , quantum mechanics , engineering , fluorescence
Polymer nanocomposites of an epoxy resin with natural montmorillonite (MMT), organically modified montmorillonite(OMMT), and halloysite nanotubes(HNTs) were prepared by the solvent casting method. Photoluminescence (PL) measurements showed that the epoxy nanocomposites with OMMT and HNTs give rise to a red‐shift of the emission band associated to bisphenol groups and to well resolved emission spectra, attributable to coplanar packing of the polymer chains in the excited states. A significant PL quenching in all the nanocomposites was observed, which depended on type and clay concentration. Atomic force microscopy (AFM) images showed a greater penetration of the epoxy resin only into the OMMT and HNT agglomerates. A relationship between the PL behavior and both the extent of confinement of polymer chains in clays agglomerates and the changes in the formation of trapping sites produced from hydroxyl groups could be revealed by AFM images and Fourier transform infrared spectroscopy (FTIR) studies. POLYM. ENG. SCI., 2011. © 2011 Society of Plastics Engineers