System snapshots of polymer nanocomposite (N = 100, Nch = 48, ϕeff = 0.10). The nanofiller, shown in blue, corresponds to a single, impenetrable cylinder with diameter dcyl = 5 (in units of σ) and infinite length. The cylinder is oriented along the direction of one of the cell axes. (left) Freely jointed chains and (right) semi-flexible, rod-like chains (θ0 = 0°). Monomers are colored according to the parent chain and are shown as semitransparent spheres for clarity. Image created with the VMD visualization software [54]. Figure panels are also available as interactive, 3-D images in Supplementary Materials.