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Curves of swelling in water (A); dynamic contact angle cycles of immersion for PU1-MDI when using the Wilhelmy plate method (B). In figure B, numbers 1 to 4 indicate the position of the plate with respect to the liquid: 1—Out of the liquid; 2—Point of touch of the sample with the liquid; 3—Immersion into the liquid (θadv I cycle); 4—Emersion from the liquid (θrec I cycle); 3’—Immersion into the liquid (θadv II cycle); 4’—Emersion from the liquid (θrec II cycle).
