Add time:08/24/2019         Source:sciencedirect.com

Nanocomposites with polystyrene, poly(styrene-co-methyl methacrylate) and poly(styrene-co-octadecyl methacrylate) matrix and pristine or oxidized, methyl ester, dodecyl ester, ethyl benzene ester functionalized multiwall carbon nanotubes are prepared by in situ polymerization reaction. Performed preparation has revealed possibility of a direct synthesis of complex nanocomposites with volatile accomplishment of the distribution and dispersion of carbon nanotubes depending on their functionalization in relation to the host matrix. Calorimetric measurements show a glass transition temperature shift downwards in all composites while the opposite is obtained by dynamical mechanical analysis. However, it turned out that the contribution of added filler in the matrix depends on the particular type of functional groups introduced to the surface of the carbon nanotubes, so that shifts towards both higher and lower values of the mechanical moduli are recorded.

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