Premium
Relationship between structure and properties of modified potato starch biodegradable films
Author(s) -
Cyras Viviana P.,
Tolosa Zenklusen María C.,
Vazquez Analía
Publication year - 2006
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.23924
Subject(s) - maleic anhydride , starch , crystallinity , glycerol , potato starch , acetic anhydride , chemical modification , materials science , chemical engineering , polymer chemistry , sorption , glass transition , differential scanning calorimetry , modified starch , absorption of water , nuclear chemistry , organic chemistry , chemistry , copolymer , composite material , polymer , catalysis , physics , adsorption , engineering , thermodynamics
Potato starch was gelatinized in the presence of water and varying amounts of glycerol at 90°C. Starch/glycerol films were prepared by casting with water. The addition of glycerol produces a decrease in the crystallinity of the starch in the films. Starch was acetylated (with acetic acid and anhydride) and maleated (with maleic anhydride). Differential scanning calorimetric analysis revealed decrease in the glass transition temperature ( T g ) with the chemical modification. The starch modification on the equilibrium moisture content was determined at 25°C. The esterifications produce a decrease in the maximum moisture sorption. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 101: 4313–4319, 2006