Figure 1.
SEM micrographs of PVA, PVA/PAA, PVA/PAA+PEG, and PVA/PAA+PEG + A samples: surface morphology (a,c,e,g, respectively) and cross-cut section (b,d,f,h, respectively) (scale bar: 10 µm). Arrows show examples of pore-like clusters.
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