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Polymers 2018, 10(8), 877; https://doi.org/10.3390/polym10080877

Synthesis of μ-ABC Tricyclic Miktoarm Star Polymer via Intramolecular Click Cyclization

1
Graduate School of Chemical Sciences and Engineering, Hokkaido University, Sapporo 060-8628, Hokkaido, Japan
2
Faculty of Engineering, Hokkaido University, Sapporo 060-8628, Hokkaido, Japan
*
Authors to whom correspondence should be addressed.
Received: 12 July 2018 / Revised: 1 August 2018 / Accepted: 1 August 2018 / Published: 6 August 2018
(This article belongs to the Special Issue Cyclic Polymers)
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Abstract

Cyclic polymers exhibit unique physical and chemical properties because of the restricted chain mobility and absence of chain ends. Although many types of homopolymers and diblock copolymers possessing cyclic architectures have been synthesized to date, there are relatively few reports of cyclic triblock terpolymers because of their synthetic difficulties. In this study, a novel synthetic approach for μ-ABC tricyclic miktoarm star polymers involving t-Bu-P4-catalyzed ring-opening polymerization (ROP) of glycidyl ethers and intramolecular copper-catalyzed azido-alkyne cycloaddition (CuAAC) was developed. First, the t-Bu-P4-catalyzed ROP of decyl glycidyl ether, dec-9-enyl glycidyl ether, and 2-(2-(2-methoxyethoxy) ethoxy) ethyl glycidyl ether with the aid of functional initiators and terminators was employed for the preparation of a clickable linear triblock terpolymer precursor possessing three azido and three ethynyl groups at the selected positions. Next, the intramolecular CuAAC of the linear precursor successfully produced the well-defined tricyclic triblock terpolymer with narrow dispersity in a reasonable yield. The present strategy is useful for synthesizing model polymers for studying the topological effects on the triblock terpolymer self-assembly. View Full-Text
Keywords: triblock terpolymer; cyclic polymer; ring-opening polymerization; polyether; click reaction triblock terpolymer; cyclic polymer; ring-opening polymerization; polyether; click reaction
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Shingu, T.; Yamamoto, T.; Tajima, K.; Isono, T.; Satoh, T. Synthesis of μ-ABC Tricyclic Miktoarm Star Polymer via Intramolecular Click Cyclization. Polymers 2018, 10, 877.

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