Fracture behavior of core-shell rubber-modified clay-epoxy nanocomposites

Autor:	Hung-Jue Sue, K. T. Gam, R. Nishimura, M. Miyamoto
Rok vydání:	2003
Předmět:	Materials science Nanocomposite Polymers and Plastics Modulus General Chemistry Epoxy law.invention Fracture toughness Natural rubber Optical microscope Transmission electron microscopy law visual_art Microscopy Materials Chemistry visual_art.visual_art_medium Composite material
Zdroj:	ResearcherID
ISSN:	1548-2634 0032-3888
DOI:	10.1002/pen.10137
Popis:	Morphology and fracture mechanisms in two nanoclay-filled epoxy systems were investigated using both microscopy and spectroscopy tools. Clay exfoliation was achieved using a series of sample preparation steps, and confirmed using wide angle X-ray diffraction (XRD) and transmission electron microscopy (TEM) techniques. Significant improvement in modulus was obtained when clay exfoliation was achieved. Incorporation of core-shell rubber (CSR) in both caly-filled epoxy systems leads to greatly enhanced fracture toughness. Optical microscopy and TEM observations of the CSR-modified nanocomposites suggest that CSR cavitation. shear yielding of the matrix, clay layer delamination. CSR bridging, crack bifurcation. and crack deflection are among the operative toughening mechanisms observed, depending on the nature of the epoxy matrix utilized.
Databáze:	OpenAIRE
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