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|Title:||Morphology and fracture behavior of intercalated epoxy/clay nanocomposites|
|Citation:||Liu, T., Tjiu, W.C., Tong, Y., He, C., Goh, S.S., Chung, T.-S. (2004-11-05). Morphology and fracture behavior of intercalated epoxy/clay nanocomposites. Journal of Applied Polymer Science 94 (3) : 1236-1244. ScholarBank@NUS Repository. https://doi.org/10.1002/app.21033|
|Abstract:||Epoxy/clay nanocomposites were prepared by swelling organoclay in an epoxy resin, diglycidyl ether of bisphenol A, followed by curing with an aromatic hardener, diethyltoluenediamine. A combination of X-ray diffraction with transmission electron microscopy showed the coexistence of intercalated and exfoliated clay morphologies throughout the matrix. In addition, a microscopic and homogeneous dispersion of clay agglomerations, with sizes ranging from about 2 to 5 μm, was revealed by optical microscopy. Dynamic mechanical analysis indicated a steady increase in storage modulus and a gradual decrease in high glass-transition temperature as the clay loading in-creased. The fracture toughness of the nanocomposites significantly increased with increasing clay concentration, suggesting a toughening effect from the clay particles. Scanning electron microscopy and optical microscopy observations of the epoxy/clay nanocomposites suggested that shear yielding of the matrix, crack deflection, voiding, and debonding of clay particles and epoxy matrix are among the operative toughening mechanisms observed. © 2004 Wiley Periodicals, Inc.|
|Source Title:||Journal of Applied Polymer Science|
|Appears in Collections:||Staff Publications|
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