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Synthesis of Hyperbranched Carbohydrate Polymers by Ring-Opening Multibranching Polymerization of Anhydro Sugar

✍ Scribed by Toshifumi Satoh; Toyoji Kakuchi

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
232 KB
Volume
7
Category
Article
ISSN
1616-5187

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✦ Synopsis

Abstract

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.

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