Abstract
Blends of pectin and high amylose starch, and pectin and poly(vinyl alcohol) (PVOH), both with and without added plasticizer, were used to make solution cast films and characterized to quantify their properties. They wereinvestigated using dynamic mechanical analysis, scanning electron microscopy, tensile testing, FT-IR, oxygen permeability, and solubility studies. The films were found to have high modulus and strength Values, with the properties depending strongly on composition. Glycerol was found to be effective as a plasticizer, and PVOH was shown to impart ductility to the pectin. Significant changes in morphology were seen with changes in composition by SEM. Hydrogen bonding of pectin in the film is affected by temperature and glycerol. Oxygen permeability of these films is much lower than found in commercial plastic films.
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