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Real 2D geometry models from SEM images for NR foams with different foam relative density of: (a) 0.3, (b) 0.4, (c) 0.45, (d) 0.5, as well as (e) the real 3D geometry obtained from 2D data for a sample with a relative density of 0.5 and (f) the final 3D structure for a foam with a relative density of 0.5 [92].
