Radiation Crosslinking of Polyurethanes: Characterization by FTIR, TGA, SEM, XRD, and Raman Spectroscopy

Figure 5

SEM of solid PU films after and before irradiated in absence of air: surfaces and cross-section of (a, a′) 0 kGy, (b, b′) 50 kGy, (c, c′) 100 kGy, and (d, d′) 150 kGy.