Plots (a) and (b) show two different projections of a CNT–PA nanocomposite with a single tube. The temperature gradient in the RNEMD simulations is along the direction of the tube axis. The ring-shaped polymer layers that can be identified in (a) are a manifestation of an ordering of the matrix around the tube.
An xz projection of the simulation cell either with two parallel (a) or two perpendicular (b) CNTs in the nanocomposite; see legend to Fig. 1.
Phonon density of states of an individual CNT and a CNT in the polymer matrix derived from the velocity autocorrelation function at T = 350 K by Fourier transform.
Temperature profile of a hot nanotube in the center of a cold polyamide matrix (xz plane). The blank central area maps the hollow CNT cylinder.
Phonon density of states of a CNT and polyamide in a nanocomposite as derived via the velocity autocorrelation function at T = 350 K.
Temperature profile in the z direction of the CNT–polyamide composite with a single tube (cf. Fig. 1). The y direction is the direction of the tube axis. Plot (a) refers to a heat transfer from the CNT to the matrix; vice versa for plot (b). The average temperature is 350 K.
Temperature profile in a nanocomposite with two parallel CNTs (xz plane). The blank areas refer to the hollow cylinder of the two nanotubes; see Fig. 4.
Calculated and expected (on the basis of atom fractions) parallel thermal conductivity λ of CNT–PA nanocomposites as a function of the CNT atom-number fraction (in %) at 350 K. The experimental results have been taken from Refs. 31 and 32. The error bars are smaller than symbols size.
Temperature profile in the CNT and PA units of a nanocomposite containing a CNT atom-number fraction of 12%. The simulations have been performed at T = 350 K.
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