Electro-selective interconversion of living cationic and radical polymerizations

• 来源期刊: 中国科学:化学（英文版）
• 年，卷（期）: 2019,（8）
• 页码范围: 1023-1029
• 页数: 7页
• 语种: 英文

摘要

Orchestrating conflicting polymerization mechanisms in a single polymerization process through one extemal stimulus is a prerequisite to achieve in-situ selective synthesis of different monomers.Here we report an electrochemically controlled mechanism transformation that enables selective activation of living cationic or radical polymerization via an alternating voltage and dual electrocatalysts.Using identical mixed-monomer condition,a variety of desired block copolymer structures,including diblock,multiblock,random,and tapered copolymers can be obtained by simply varying the periods or phases of the alternating potential.Moreover,merging this electro-interconverted polymerization with a flow-chemistry technique can streamline preparation of functional polymer materials with complex multiblock structure.This study would offer a new vision on large-scale electrochemical synthesis of sequence-defined polymers.