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Synthesis of Hyperbranched Carbohydrate Polymers by Ring‐Opening Multibranching Polymerization of Anhydro Sugar
Author(s) -
Satoh Toshifumi,
Kakuchi Toyoji
Publication year - 2007
Publication title -
macromolecular bioscience
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.924
H-Index - 105
eISSN - 1616-5195
pISSN - 1616-5187
DOI - 10.1002/mabi.200700057
Subject(s) - cationic polymerization , branching (polymer chemistry) , polymer , chemistry , polymer chemistry , polymerization , carbohydrate , ring opening polymerization , degree of polymerization , anionic addition polymerization , dextran , organic chemistry
The synthesis of novel hyperbranched carbohydrate polymers, prepared by the ring‐opening multibranching polymerizations of anhydro and dianhydro sugars, is described. The hyperbranched carbohydrate polymers were formed by the cationic polymerization of 1,6‐anhydro‐ β ‐ D ‐hexopyranose, 1,4‐anhydrotetritol, 2,3‐anhydrotetritol, and 1,2:5,6‐dianhydro‐ D ‐mannitol. These polymerizations proceeded without gelation to produce water‐soluble hyperbranched carbohydrate polymers with controlled molecular weights and narrow polydispersities. The values for the degree of branching of the polymers were in the range of 0.28–0.50. The polymerization method, which proceeds through a ring‐opening reaction by a proton‐transfer reaction mechanism, is a facile method leading to a spherical carbohydrate polymer with a high degree of branching.