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Authors
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Ivanoska-Dacikj, A. ; Bogoeva-Gaceva, G. ; Rooj, S. ; Wießner, S. ; Heinrich, G.
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Title
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Fine tuning of the dynamic mechanical properties of natural rubber/carbon nanotube nanocomposites by organically modified montmorillonite: A first step in obtaining high-performance damping material suitable for seismic application
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Date
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01.12.2015
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Number
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47561
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Abstract
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Hybrid natural rubber (NR) nanocomposites, containing 2 phr multiwalled carbon nanotubes (MWCNT) and different quantities (from 0 to 20 phr) of expanded organically modified montmorillonite (EOMt), were prepared in order to produce a NR based material with superior mechanical properties as a first step in obtaining a high-performance damping material suitable for seismic application. Initially a master batch of NR/MWCNT was prepared and then a dilution technique was used for the preparation of NR/EOMt/MWCNT nanocomposites. Raman spectra showed a strong interaction between the rubber matrix and MWCNT and the existence of an only physical mixture of the MWCNT and EOMt. This was reflected on the mechanical properties (both quasi-static and dynamic) which were found to change in the desired way. A remarkable improvement of the lower tensile modulus, tensile strength and storage modulus was achieved with the addition of MWCNT and then a gradual but permanent improvement of the above mentioned properties including improved elasticity and elongation at break with the addition of EOMt. DMA strain sweep measurements showed a pronounced non-linear dependence and a significant increase of the loss factor tan d (a measure of the dissipation energy) for the nanocomposites with filler concentrations above the mechanical percolation threshold (16 phr).
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Publisher
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Applied Clay Science
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Wikidata
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Citation
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Applied Clay Science 118 (2015) 99-106
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DOI
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https://doi.org/10.1016/j.clay.2015.09.009
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Tags
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carbon nanotubes organo-montmorillonite rubber nanocomposites natural rubber
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