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Updated: Sep 20, 2026

Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers
Published on: December 16, 2022
Preparation of a unique glucan with large intervals in molecular weight distribution. Controlled ring-opening
Masato Suzuki1, Tomofumi Shimazaki
1Department of Organic and Polymeric Materials, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8552, Japan. msuzuki@polymer.titech.ac.jp
Abstract:
O-Permethylated cyclodextrins (MeCDs) were found to be polymerizable with the initiator-activator system of HI-I2 or HI-ZnX2, undergoing ring-cleavage to give linear 1-->4-glucan. Among several conditions investigated, HI-ZnCl2 in CH2Cl2 at 0 degree C proved most effective to control this cationic ring-opening polymerization (CROP). The MALDI-TOF-MS spectrum revealed that the molecular weight distribution of the glucan obtained from gamma-MeCD uniquely consisted of large, regular intervals, each of which were identical to the molecular weight of gamma-MeCD (1634).
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