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Architecture of polysaccharides with specific structures: synthesis of hyperbranched polysaccharides
Author(s) -
Kadokawa Junichi,
Tagaya Hideyuki
Publication year - 2000
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/1099-1581(200003)11:3<122::aid-pat953>3.0.co;2-n
Subject(s) - branching (polymer chemistry) , monomer , gel permeation chromatography , polymerization , polysaccharide , degree of polymerization , cationic polymerization , materials science , polymer chemistry , sugar , oxazoline , molar mass distribution , polymer , catalysis , polymer science , organic chemistry , chemistry , composite material
An oxazoline sugar monomer 1 having two hydroxy groups was employed as an AB 2 type monomer for the synthesis of a hyperbranched aminopolysaccharide 2. The polymerization of 1 was carried out in the presence of an acid catalyst. The unit structure of product polysaccharide was determined to be β‐glucopyranan. The degree of branching was estimated by calculation of the content of the terminal units in the total units after the reaction of the polymerization product with 1,3‐dichloro‐1,1,3,3‐tetraisopropyldisiloxane. The molecular weight determined by the light‐scattering method was higher than that estimated by gel permeation chromatography. The detosylation of 2 took place under the alkaline conditions, giving rise to a free hyperbranched aminopolysaccharide. Copyright © 2000 John Wiley & Sons, Ltd.