Journal
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
Volume 46, Issue 17, Pages 1837-1844Publisher
WILEY
DOI: 10.1002/polb.21517
Keywords
epoxy; nanocomposites; Nanofil; nanolayers; polymer nanocomposite; rheology; X-ray diffraction
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Funding
- Direccion General de Investigacion (Ministerio do Educacion y Ciencia) [MAT2006-03997]
- EU (Program FEDER)
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Dispersions of a bisphenol A-based epoxy resin with an organophilic montmorillonite (Nanofil 919) were studied by X-ray diffraction and oscillatory shear rheometry. X-ray studies reveal that the clay is intercalated by the epoxy and forms stable dispersions. The viscoelastic behavior of the nanodispersions was measured as a function of the Nanofil concentration and temperature. An increase in both G' and G moduli was detected as the concentration increases. Furthermore, a transition from a liquid-like behavior, at low temperatures, to a solid-like behavior, at higher temperatures, was observed for all the samples. This transition is accounted for the formation of a percolated structure of interconnected tactoids through hydrophobic interactions. (C) 2008 Wiley Periodicals, Inc.
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