4.7 Article

Deformation mechanism of epoxy/clay nanocomposite

Journal

EUROPEAN POLYMER JOURNAL
Volume 43, Issue 3, Pages 782-788

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.eurpolymj.2006.11.028

Keywords

nanocomposite; epoxy; deformation mechanism; strength

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Polymer-layered silicate nanocomposites have been noticed recently due to their outstanding properties. The mechanical properties and deformation mechanism of epoxy/montmorillonite nanocomposites under compressive and flexural loadings were investigated. A reduction in compressive and flexural yield stress and also glass transition temperature with increasing the amount of organoclay was observed. This change in mechanical behavior of epoxy can be explained with observation of plastic deformation mechanism. The study of deformation mechanism revealed that presence of organoclay accelerates shear yielding in epoxy. Microscopic evaluation illustrated that nanoparticles in this system act as initiation sites for shear bands, and thus, enable the epoxy to undergo massive shear yielding. (c) 2006 Elsevier Ltd. All rights reserved.

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