Figure 10.

Details of the structural deformation of IP-Dip foam rods, specifically showing the regions within the dashed boxes in Figure 8. The SEM images show the ends of the rod (a) without and (b) with a 15-um-thick fully dense cap layer. Resin shrinkage during development and drying produced residual axial shear stresses and associated plastic strains in both the foam only and the foam with top cap, as shown schematically in (c,d) and also indicated in the SEM images; the arrow lengths are notional representations of the relative magnitude of the axial shear stresses.