Fig. 1 shows the WVP of banana films with different plasticizers. Results indicated that increased the glycerol
concentrations in banana films to 30% had increased the WVP of the films. In contrast, incorporation of sorbitol and
PEG in banana films up to 40% concentrations had lowered the WVP values. Glycerol molecules have high capacity to
interact with the polymer chain because of its small size thus enhanced its molecular mobility. Meanwhile, at 40%
concentration of glycerol, the value of WVP decreased.
However, at 50% concentration of plasticizers, the WVP became higher. In general, PEG had lower WVP at 30 and
40% concentrations.