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RESEARCH PRODUCT
Viscoelastic behavior of epoxy prepolymer/organophilic montmorillonite dispersions
Clara M. GómezDaniel LópezRafael Muñoz-espíAndrés NohalesLorena Solarsubject
Materials sciencePolymers and PlasticsPolymer nanocompositeRheometryConcentration effectEpoxyCondensed Matter PhysicsViscoelasticitychemistry.chemical_compoundMontmorillonitechemistryRheologyvisual_artMaterials Chemistryvisual_art.visual_art_mediumPhysical and Theoretical ChemistryComposite materialPrepolymerdescription
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. © 2008 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 46: 1837–1844, 2008
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2008-09-01 | Journal of Polymer Science Part B: Polymer Physics |