Unformatted text preview: .usm.my This study was carried out to evaluate the mechanical, thermal and morphological properties of epoxy/glass fiber/precipitated nano-calcium carbonate (PNCC) hybrid nanocomposites. The PNCC (2-8 wt %) was incorporated into diglycidyl ether bisphenol A (epoxy)/cycloaliphatic amine (curing agent) using sonication technique followed by mechanical stirring. The epoxy/curing agent/PNCC mixture was impregnated into chopped strand mat glass fiber (4 layers) using hand-lay up process. The mechanical properties of the epoxy hybrid nanocomposites were characterized using three -point bending flexural and fracture toughness tests. The fractured surface morphology of the epoxy/glass fiber/PNCC nanocomposites was examined using field emission scanning electron microscopy (FESEM). The thermal properties and stability of the nanocomposites was investigated using thermogravimetry analysis (TGA). It was found that the flexural properties and fracture toughness of the epoxy hybrid nanocomposites was improved in the presence of nano-calcium carbonate, attributed to the ultra -fine particles size of the PNCC and its homogenous dispersion. However, TGA results show that the thermal stability o f the epoxy hybrid nanocomposites was reduced by the PNCC, which may related to the decomposition of the surface modifier on the PNCC. From the FESEM micrographs, it was found that the fracture morphology and behavior of the epoxy hybrid composites (e.g. fiber pull-out, debonding of fiber) was influenced by the PNCC loading. POLY-P11 EFFECTS OF OXIDIZED POLYETHYLENE AS A COMPATIBILIZER ON THE TENSILE PROPERTIES OF HDPE/SOYA PROTEIN/KENAF CORE COMPOSITES A. Hamid Abdullah, H. Ismail and A. Abu Bakar School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia, 14300 Nibong Tebal, Pulau Pinang, Malaysia E-mail: [email protected] HDPE/soya protein/kenaf core composites were prepared by incorporation of kenaf core powder at different loadings into HDPE/soya protein composite with an internal mixer (Haake PolyLab) for 12 min at 180 °C and 50 rpm rotor speed. A compatibilizer oxidized polyethylene (OXPE) was used to improve the matrix-filler interaction and t...
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This note was uploaded on 02/17/2011 for the course CHEMISTRY 101 taught by Professor Csr during the Spring '11 term at University of Louisville.
- Spring '11