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Catalytic Halogen Exchange in Supplementary Activator and Reducing Agent Atom Transfer Radical Polymerization for the Synthesis of Block Copolymers.

Authors
  • De Bon, Francesco1, 2
  • Abreu, Carlos M R2
  • Serra, Arménio C2
  • Gennaro, Armando1
  • Coelho, Jorge F J2
  • Isse, Abdirisak A1
  • 1 Department of Chemical Sciences, University of Padova, Via Marzolo 1, Padova, 35131, Italy. , (Italy)
  • 2 Centre for Mechanical Engineering, Materials and Processes, Department of Chemical Engineering, University of Coimbra, Rua Sílvio Lima, Pólo II, Coimbra, 3030-790, Portugal. , (Portugal)
Type
Published Article
Journal
Macromolecular rapid communications
Publication Date
Dec 02, 2020
Identifiers
DOI: 10.1002/marc.202000532
PMID: 33289265
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Synthesis of block copolymers (BCPs) by catalytic halogen exchange (cHE) is reported, using supplemental activator and reducing agent Atom Transfer Radical Polymerization (SARA ATRP). The cHE mechanism is based on the use of a small amount of a copper catalyst in the presence of a suitable excess of halide ions, for the synthesis of block copolymers from macroinitiators with monomers of mismatching reactivity. cHE overcomes the problem of inefficient initiation in block copolymerizations in which the second monomer provides dormant species that are more reactive than the initiator. Model macroinitiators with low dispersity are prepared and extended to afford well-defined block copolymers of various compositions. Combined cHE/SARA ATRP is therefore a simple and potent polymerization tool for the copolymerization of a wide range of monomers allowing the production of tailored block copolymers. © 2020 Wiley‐VCH GmbH.

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