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Skin and layer formation in films prepared from carbohydrates, poly(ethylene‐ co ‐acrylic acid), and polyethylene
Author(s) -
Swanson C. L.,
Fanta G. F.,
Salch J. H.
Publication year - 1993
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.1993.070491001
Subject(s) - dextrin , polyethylene , acrylic acid , plasticizer , maltodextrin , low density polyethylene , polymer chemistry , materials science , chemical engineering , ammonium hydroxide , aqueous solution , ethylene , chemistry , organic chemistry , copolymer , polymer , composite material , catalysis , starch , engineering , spray drying
Cornstarch, a canary dextrin, and a maltodextrin were compared in films blown from carbohydrates compounded with poly(ethylene‐ co ‐acrylic acid) (EAA), low‐density polyethylene (LDPE), and aqueous ammonium hydroxide plasticizer. Dextrins or maltodextrins having dextrose equivalent values of one and greater caused dark‐colored films with caramel odors, probably due to Maillard reactions. Blown films with hydrophobic skins and water sensitive cores were produced with the dextrinized carbohydrates, but not from natural cornstarch. Water sensitivity of films containing the dextrinized carbohydrate was reduced by recycling the films through the blown film die. A mechanism for development of the skins is proposed, as is a method for preparing thin semipermeable membranes. © 1993 John Wiley & Sons, Inc. This article is a US Government work and, as such, is in the public domain in the United States of America.