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- W2158649200 abstract "Graphene platelets (GP) are a novel class of nanofillers due to its good compatibility with most polymers, high aspect ratio, high absolute strength and cost-effectiveness. We in this study synthesised two types of epoxy/GP nanocomposites with different interface strength using the combination of sonication and chemical modification. Although the surface-modified graphene platelets (m-GP) formed clusters, a higher degree of dispersion and exfoliation of graphene was observed in each cluster owning to the improved interface by modification. The scrolling of graphene was found predominantly in the interface-modified nanocomposite. At 4 wt%, the modified nanocomposite shows fracture energy release rate G1c 613.4 J m−2, while the unmodified nanocomposite indicates 417.3 J m−2, in comparison with neat epoxy G1c 204.2 J m−2. The interface modification enhanced the glass transition temperature of neat epoxy from 94.7 to 108.6 °C, 14.7% increment. Toughening mechanisms are attributed to the voiding, microcracking and breakage of GP, while matrix may not consume as much fracture energy as m-GP do." @default.
- W2158649200 created "2016-06-24" @default.
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- W2158649200 date "2011-03-01" @default.
- W2158649200 modified "2023-10-12" @default.
- W2158649200 title "Epoxy/graphene platelets nanocomposites with two levels of interface strength" @default.
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- W2158649200 doi "https://doi.org/10.1016/j.polymer.2011.02.003" @default.
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