The increase in the water absorption of the polymeric matrix facilitates the instability of the intermolecular interactions, causing its disintegration and con- sequently enhanced the solubility(Carvalho et al., 2009). Water absorption was dropped as burial time is increased, owing to the fact that some starch particle was leached away from the specimen(Kee, Sun, & Seib, 2003). The presence of span80 increases the affin- ity toward water by reducing the number of polar groups available to interact with water molecules and increases the water sorption of the films at later stages of degradation(Fig. 1b). The hydrophobic character of the span-80 decreases the number of O H bonds and the presence of aliphatic groups, which changes the film structure leading to the formation of film with less solubility in water