Detailed configurations for polyethylene chains with varying average length and constant standard deviation (σ = 1 nm) in molecular dynamics simulation. The initial size of the simulation domain is fixed as 50 nm × 10 nm × 10 nm for all cases.

Average chain length (L0)	5 nm	10 nm	15 nm	20 nm	25 nm	30 nm
Number of chains (N)	225	112	75	56	45	37
Total number of atoms	27 000	26 880	27 000	26 940	27 000	26 640
Final density after NPT relaxation (g cm−3)	0.69	0.71	0.70	0.68	0.68	0.72
Simulation box size after NPT relaxation: X (nm)/Y (nm)/Z (nm)	19.8/4.0/4.0	20.1/3.9/4.0	20.0/4.0/4.0	20.9/3.9/3.9	19.5/4.1/4.1	19.6/4.0/4.0