Coarse-graining modeling of primitive chains in entangled polymer melts

Abstract

In this paper, we provide a coarse-graining method to obtain the primitive chain from a polymer chain configuration in the entangled polymer melt by knocking out its high-frequency Rouse modes. Adopting this coarse-graining procedure, we theoretically demonstrate that the tube step length is twice the tube diameter. Moreover, a simple method to visualize the tube by adding high-frequency modes to the primitive chain is also provided.