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Monolayers of amylose ester derivatives
Author(s) -
Itoh Takahiro,
Matsumoto Mutsuo,
Miyamoto Takeaki,
Suzuki Hidematsu
Publication year - 1993
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.4990300311
Subject(s) - monolayer , amylose , cellulose , bilayer , polymer , homogeneous , plateau (mathematics) , methyl cellulose , materials science , chemical engineering , polymer chemistry , amphiphile , surface pressure , starch , chemistry , organic chemistry , composite material , copolymer , thermodynamics , nanotechnology , membrane , mathematics , mathematical analysis , biochemistry , physics , mechanics , engineering
Amphiphilic polymers of amylose tri( n ‐decanoate) (C10AS) and amylose tri( n ‐octadecanoate) (C18AS) were prepared and examined with respect to their ability to form monolayers at the air‐water interface. The surface pressure‐area isotherm of C10AS was found to have a plateau region, indicating a monolayer‐to‐bilayer transition, while the isotherm for C18AS had no such plateau. Transmission electron microscopic observations of the transferred films revealed that C10AS formed a homogeneous monolayer film at a particular point of the π‐A isotherm, while C18AS gave no homogeneous film at any point of the isotherm. These results are different from those derived from the corresponding cellulose esters. The differences in the isotherms and fine structures of the transferred films are discussed in terms of the difference in chemical structure between amylose and cellulose.