“…These results show that the rate of the formation of the PVA-iodine complex was smaller than that of the iodine sorption. It is well known that Young's modulus of a polymer gel, E, is expressed as a function of the volume fraction of the polymer, V,, as follows19-22: log E = log A + B log V, (6) where A and B are constants. Young's moduli of water-swollen PVA membranes are plotted against the volume fraction of polymer, V, = 1 -H,, in Figure 4, to show that eq.…”