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Authors
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Vijayan , P. ; Puglia, D. ; Pionteck, J. ; Kenny, J. M. ; Thomas, S.
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Title
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Liquid-rubber-modified epoxy/clay nanocomposites: effect of dispersion methods on morphology and ultimate properties
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Date
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01.07.2015
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Number
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47146
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Abstract
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Epoxy/clay nanocomposites modified with carboxyl-terminated poly (butadiene-co-acrylonitrile) (CTBN) liquid rubber (epoxy/clay/CTBN nanocomposites) are synthesized using two different pre-mixing techniques: mechanical high shear mixer (homogenizer) and ultrasonication using tip sonicator. The observations suggest that low molecular weight CTBN easily diffuses into clay galleries, thereby increasing the d-spacing in epoxy/clay/CTBN nanocomposites, regardless of pre-mixing method. High shear mixing causes breaking of clay platelets in epoxy/clay/ CTBN nanocomposites, leading to a reduction in the aspect ratio. Epoxy/clay/CTBN nanocomposites prepared via sonication have achieved a uniform and stable morphology, in which the clay platelets are dispersed in epoxy matrix in such a way that most of them try to localize near the phase-separated CTBN domains. Thermal and mechanical properties of the resulting nanocomposites are correlated with morphological findings.
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Publisher
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Polymer Bulletin
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Wikidata
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Citation
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Polymer Bulletin 72 (2015) 1703-1722
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DOI
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https://doi.org/10.1007/s00289-015-1365-9
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Tags
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layered silicate nanocomposites co-acrylonitrile ctbn mechanical-properties thermal degradation fracture-behavior phase-separation toughened epoxy cure kinetics clay/epoxy nanocomposites clay nanocomposites
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