Molecular dynamics (MD) simulations were carried out on the polymers shown below with input files and initial configurations that were generated expediently with a coarse-grained (CG) resolution using CHARMM-GUI's Polymer Builder. In this workflow, a CG model of polymeric chains containing 50-mers (except in the case of polystyrene, 25-mer) are solvated in a water box, equilibrated for 20 ns at 300 K using OpenMM, (the default 𝜆 value is used for non-bound interactions strength), and then replaced with all-atom relaxed topologies. Next, the atomic structures are minimized and equilibrated, first in the canonical ensemble (NVT), then in the constant-pressure ensemble (NPT) with time steps of 1 and 2 fs, respectively, using the open source large-scale atomic/molecular massively parallel simulator (LAMMPS) code. Finally, the AR models corresponding to each polymer are generated as described below using snapshots that can be taken from the NPT simulation step.