Journal
COMPOSITES SCIENCE AND TECHNOLOGY
Volume 71, Issue 16, Pages 1859-1866Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2011.08.019
Keywords
Nanocomposites; Dynamic mechanical analysis; Mechanical properties; Fracture toughness; Scanning electron microscopy
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Polyamide 6 (PA 6)/halloysite nanotubes (HNT) nanocomposites were prepared by melt-extrusion compounding via masterbatch dilution process. A homogeneous dispersion of HNTs in PA 6 matrix was achieved. Differential scanning calorimetric measurements showed that addition of HNTs into PA 6 matrix enhanced the crystallization temperature and degree of crystallinity, thus indicating an effective nucleation induced by the addition of HNTs. Upon halloysite addition, glass transition temperature, storage modulus, Young modulus, tensile strength and notched Charpy impact strength increased without loss of ductility. For the first time, the essential work of fracture (EWF) concept was used to analyse the toughening and fracture behaviour of PA 6/HNT systems. Significant increase (+38%) of the essential work of fracture of PA 6/HNT nanocomposites was noticed at HNTs contents as low as 4 wt.%. (C) 2011 Elsevier Ltd. All rights reserved.
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