Abstract
Coarse-grained molecular dynamics simulations are used to investigate the conformations of semiflexible ring-linear blends in ellipsoidal confinement. Ordered structures of semiflexible ring polymers (SRPs) in ring-linear blends rely strongly on the number density of blends (ρ), the chain length (Nlinear) and the bending energy (Kb,linear) of semiflexible linear polymers, as well as the curvature of confinement. For a low number density ρ, SRPs are immersed randomly in the matrix of linear polymers in ellipsoid confinement. However, for a high number density ρ, a complete separation of SRPs from flexible linear polymers occurs, and a highly ordered aggregation structure of SRPs at the equatorial plane is formed in the mixture of semiflexible linear polymers with large Kb,linear. These explicit ordered aggregations of SRPs in ellipsoidal confinement are induced by a delicate competition between the entropic excluded volume (depletion) effects and bending contributions. This investigation can help us understand the complicated conformations of ring-linear blends in ellipsoidal confinement.
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