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TEM images of the epoxy nanocomposite with 2.5 wt % in situ synthesized nanoparticles at high [(a) and (b)] and low [(c) and (d)] magnifications. The scale bars are 5 nm (a), 20 nm (b), 0.2 μm (c), and 1 μm (d).
UV-vis spectra in the transmittance mode of the pristine resin and the in situ nanocomposite.
(a) DSC thermograms of the second heating scan of the pristine epoxy and the 2.5 wt % nanocomposite with 5 K/min. The crosses indicate the onset and the end of the glass transition process, whereas the circles (●) correspond to the glass transition temperature. For clarity, the curves are shifted vertically. (b) The storage modulus obtained at 1 Hz from dynamic mechanical analysis (DMA).
(a) Real and imaginary part of the dielectric susceptibility for the pristine epoxy and the nanodielectric. (b) The dielectric breakdown failure probability data measured with 500 V/s at a power frequency of 60 Hz at 77 K. The solid lines in (b) correspond to estimates from a Weibull statistical analysis.
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