Advances in structural analysis of advanced materials : by Moussa Karama

By Moussa Karama

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Read or Download Advances in structural analysis of advanced materials : selected, peer reviewed papers from the International Conference on Structural Analysis of Advanced Materials (ICSAAM - 2009), September 7-10, 2009, Tarbes, France PDF

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Additional resources for Advances in structural analysis of advanced materials : selected, peer reviewed papers from the International Conference on Structural Analysis of Advanced Materials (ICSAAM - 2009), September 7-10, 2009, Tarbes, France

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Copo CNT graft. copo Figure 9: Storage modulus at 230°C and glass transition temperature Tα as a function of the type of the filler. Nevertheless, the enhancement of the properties measured is significant. Compared to the unfilled epoxy properties, the adsorbed copolymers allow increasing of 14% the storage modulus, and the grafted copolymers bring a significant increase of 30%. Table 4: Storage modulus at 230°C and glass transition temperature (max G’’) Nanocomposite G’ [x107 Pa] Tα [°C] Pure resin 1,06 195 Resin + CNT 0,89 186 Resin + CNT adsorbed copolymer 1,21 201 Resin + CNT grafted copolymer 1,38 203 Conclusion We have presented the effect of block copolymers, as a dispersing agent, on the carbon nanotubes dispersion in an epoxy matrix.

But due to the very low content of the oxygenated function at the MWCNT interface, no direct proofs have been detected neither by XPS nor NMR. Figure 3: Reaction between MWNT-COOH and PAA. Effect of grafting density on the copolymer thermal degradation To measure the grafting density efficiency, the PAA-PMMA diblock copolymer synthesized « in situ » was washed with dioxane and the free copolymer was eliminated by centrifugation. Then, the dried deposit of grafted copolymer was analyzed by TGA to determine the residual rate as the CNT quantity and the thermal degradation temperature (Fig.

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