Nanoclay dispersion in a miscible blend: an assessment through rheological analysis |
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Authors: | Mahdi Ghelichi Nader Taheri Qazvini Seyed Hassan Jafari Hossein Ali Khonakdar Uta Reuter |
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Affiliation: | (1) Department of Polymer, School of Chemical Engineering, College of Engineering, University of Tehran, P.O. Box 11155–4563, Tehran, Iran;(2) Department of Polymer, School of Chemistry, College of Science, University of Tehran, P.O. Box 14155–6455, Tehran, Iran;(3) Iran Polymer and Petrochemical Institute, P.O. Box 14965–115, Tehran, Iran;(4) Leibniz Institute of Polymer Research Dresden, Hohe Str. 6, D-01069 Dresden, Germany; |
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Abstract: | In this study, miscible polymer blend nanocomposite of Poly(ethylene oxide)/Poly(methyl methacrylate), (PEO/PMMA), with sodium
montmorillonite (Na+-MMT) clay were prepared at a constant concentration of nanoparticles via different solution intercalation methods. The resultant
nanocomposites possess different structure and dispersion of Na+-MMT clays which are assessed through a combination of transmission electron microscopy (TEM) and X-ray diffraction (XRD).
The rheology of the neat blend and two different layered silicate nanocomposites were investigated using linear viscoelastic
measurements with a parallel plate rheometry at small strain amplitudes. It was found that regardless of the extent of dispersion,
the storage and loss modulus increased by incorporating the nanoparticles into the matrix of PEO/PMMA. Moreover, at low frequencies
the rheological response of the nanocomposite in which layered silicates benefit from a better dispersion becomes relatively
invariant with frequency and represents a mediocre solid-like behavior in comparison to the nanocomposite in which the nanoparticles
are intercalated or agglomerated. |
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