| 초록 |
Effects of additives with different the functional groups i.e., -OH and -COOH, on the physical properties starch/PVA blend films were examined. Glycerol(GL) with 3 -OH, succinic acid(SA) with 2 -COOH, malic acid(MA) with 1 -OH and 2 -COOH, and tartaric acid(TA) with 2 -OH and 2 -COOH were used as additives. The results of measured mechanical properties verified that -OH and -COOH as a functional groups increased the flexibility and strength of the film. Values of degree of swelling(DS) and solubility(S) for GL-added and SA-added films were low. However, DS and S values of the films added MA or TA with both -OH and -COOH were comparatively high. |
