  The dynamical properties of entangled polymers originate from the dynamic
constraints due to the uncrossability between polymer chains. We propose a
highly coarse-grained simulation model with transient bonds for such
dynamically constrained systems. Based on the ideas of the responsive particle
dynamics (RaPiD) model [P. Kindt and W. J. Briels, J. Chem. Phys. 127, 134901
(2007)] and the multi-chain slip-spring model [T. Uneyama and Y. Masubuchi, J.
Chem. Phys. 137, 154902 (2012)], we construct the RaPiD type transient bond
model as a coarse-grained slip-spring model. In our model, a polymer chain is
expressed as a single particle, and particles are connected by transient bonds.
The transient bonds modulate the dynamics of particles but they do not affect
static properties in equilibrium. We show the relation between parameters for
the entangled polymer systems and those for the transient bond model. By
performing simulations based on the transient bond model, we show how model
parameters affect the linear viscoelastic behavior and the diffusion behavior.
We also show that the viscoelastic behavior of entangled polymer systems can be
well reproduced by the transient bond model.
