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Anisotropy effect in the evaluation of the area fraction of GNP structures (PC with 1 wt % GNP), based on light microscopy images: perpendicular to the strand direction (a) after 5 min and (c) after 30 min mixing; parallel to the strand direction (b) after 5 min and (d) after 30 min mixing; particle size distributions based on circle equivalent particle diameters.
