Fig. 20.

The radial dependence of the relaxation time of the torsional autocorrelation function of polyethylene around a silica nanoparticle. All values are averages taken in 5 Åshells around the nanoparticle center of mass. The points have been offset slightly for the three systems along the x axis for clarity. The dotted line simply indicates the value obtained for the 30-chain pure polymer system at the same temperature ($400\text{K}$). (Reprinted with permission from Ref. [167]. Copyright (2008) American Chemical Society.)