Since the rheological analyses are very sensitive to the occurred
structural changes experienced by polymers upon UVB irradiation,
SBS samples before and after 48 h of exposure have been analyzed
by linear oscillatory tests. In Fig. 6(a, b), the complex viscosity (h*)
and storage (G0
) and loss (G00) moduli of SBS at 0 h and 48 h of UVB
aging are shown, respectively.