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Updated: Sep 9, 2025

Particles without a Box: Brush-first Synthesis of Photodegradable PEG Star Polymers under Ambient Conditions
Published on: October 10, 2013
Precision Synthesis of End-Functionalized Star Poly(vinyl alcohol)s by RAFT Polymerization and Post-polymerization
Gaishi Murakami1, Tomohiro Kubo1, Kotaro Satoh1
1Department of Chemical Science and Engineering, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan.
None:
Poly-(vinyl alcohol) (PVA) has been widely used in industrial and consumer products. In this study, we aimed to address this challenge by synthesizing well-defined multiarm poly-(vinyl acetate) (PVAc) through the use of nonhydrolyzable vinyl ether-type multifunctional RAFT agents. The control over molecular weights was achieved by the RAFT process to afford polymers with dominant head-to-head linkages at the terminal. Especially, quantitative end-functionalization of the synthesized PVAc was performed using Michael thiol-ene or disulfide exchange reactions. Consequently, saponification of the PVAc enabled the synthesis of end-functionalized multiarm PVA in an efficient manner. This straightforward approach afforded well-defined functional PVAs, which enable further chemical modification, thus widening the utility of PVA in a range of applications, such as precisely controlled network synthesis and bioconjugation.
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