shows the chain-length-dependent density compared to previous simulation results. Despite the effect of temperature, both models show similar asymptotic behavior of chain-length dependence of the density, which converges to a plateau value for N > 60. In addition, we analyzed the chain dimensions of PS melts with various chain lengths. As seen in Figure (b), the radius of gyration R g and chain end-to-end distances R ete are plotted as a function of chain length N . A power law fit is performed for both radius of gyration and end-to-end distance, giving R g ∼ N ν with ν ≈ 0.565 and R ete ∼ N ν with ν ≈ 0.555, respectively. As a comparison, ν ≈ 0.551 for PS melts over a similar chain-length range was found in a recent work. Moreover, the ratio ⟨R 2 ete ⟩/⟨R 2 g ⟩ ≈ 6.03 for CG-PS model with N = 100 monomers is very close to the value of 6 predicted for Gaussian chains. These results underscore the robust transferability of the molecular weight within the derived CG PS model.