Figures 5.19 to 5.22 give the tensile properties (tensile strength, Young’s modulus, and elongation at break) of the blends based on a modified starch and EVOH. The dashed line in the figures denotes a linear additive rule as a reference. For the tensile properties of the blend based on modified starch and EVOH, it is worth noting that all (AS-B)/EVOH blends, (AS-LF)/EVOH blends, (CS-B)/EVOH blends, and (CS-LF)/ EVOH blends exhibit a positive deviation from linearity for the tensile properties versus composition plots. Then the tensile properties of blends are enhanced over those of the constituent components. These synergistic effects obtained in the blends suggest an enhanced miscibility between the modified starch and EVOH. Usually, the synergistic effects for tensile properties have been found in miscible blends in which the densification of the blends occurred due to the specific interaction. We ascribed the apparent miscibility of the blends to the formation of hydrogen bonds between the hydroxyl groups in a modified starch and the hydroxyl group in vinyl alcohol units of EVOH. In the previous section, the attractive interaction between a modified starch and EVOH in the blends have been characterized by FTIR spectroscopy and DSC.
- Miscibility of Blends Based on Modified Starch and EVOH Characterized by Phase Diagrams
- Hydrogen Bonding in Blends based on Modified Starch and EVOH Characterized by DSC and FTIR
- Crystallization of EVOH in Blends based on Modified Starch and EVOH
