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- W2017336506 abstract "BACKGROUND: The development of polymeric nanocomposites incorporating intercalated or exfoliated layered silicate clays into the organic matrix has been substantially motivated by the significant improvements induced by the presence of the inorganic component. Moreover, understanding and controlling the dispersion of inorganic layers into segmented polyurethane matrices by means of ionic interactions, and exploiting these interactions to enhance physicomechanical behaviour, could be of great interest in the field of polymer nanocomposites.RESULTS: New cationic polyurethane elastomers were prepared starting from poly(butylene adipate)diol (Mn = 1000 g mol−1), 4,4′-diphenylmethane diisocyanate, 1,4-butanediol and N-methyldiethanolamine or N,N′-β-hydroxyethylpiperazine, used as potential quaternizable moieties. The characterization of the polymers was achieved using specific analyses employed for the macromolecular samples (Fourier transform infrared and 1H NMR spectroscopy, thermogravimetric analysis (TGA), gel permeation chromatography). An extension of our research on polymers reinforced with organically modified montmorillonite (OM-MMT) in order to prepare hybrid composites with improved properties was performed and the resulting materials were characterized using TGA, X-ray diffraction, atomic force microscopy and scanning electron microscopy. Also, the mechanical properties of the cationic polyurethane/OM-MMT composites were investigated in comparison with the pristine ionic/non-ionic polymers and their composites containing non-ionic polymer blended with OM-MMT or ionic polymer and unmodified MMT.CONCLUSION: The insertion of the organically modified clay into the polymeric matrix gave an improvement of the mechanical properties of the polyurethane composites, especially the tensile strength and stiffness of the hybrid materials. Copyright © 2009 Society of Chemical Industry" @default.
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- W2017336506 date "2009-07-29" @default.
- W2017336506 modified "2023-10-18" @default.
- W2017336506 title "Synthesis and characterization of polyurethane cationomer/MMT hybrid composite" @default.
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- W2017336506 doi "https://doi.org/10.1002/pi.2647" @default.
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