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Copper-Mediated Polymerization without External Deoxygenation or Oxygen Scavengers.

Evelina Liarou1, Richard Whitfield1, Athina Anastasaki1

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|May 15, 2018
PubMed
Summary

This study introduces a simple copper-zero reversible deactivation radical polymerization (RDRP) system that avoids rigorous deoxygenation. This method enables controlled polymerization of various monomers, offering a scalable and versatile alternative for polymer synthesis.

Keywords:
ATRPcoppermonomersoxygenpolymerization

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Area of Science:

  • Polymer Chemistry
  • Materials Science
  • Organic Synthesis

Background:

  • Copper-mediated controlled radical polymerization, such as atom-transfer radical polymerization (ATRP), often requires stringent deoxygenation.
  • External additives like reducing agents or enzymes are typically used to facilitate these processes.
  • These requirements can limit the scope and practicality of polymerization methods.

Purpose of the Study:

  • To develop a simplified copper-mediated controlled radical polymerization system.
  • To eliminate the need for rigorous deoxygenation and external additives.
  • To establish a versatile and scalable polymerization method.

Main Methods:

  • A novel copper-zero reversible deactivation radical polymerization (RDRP) system was developed.
  • Polymerization was controlled by adjusting the headspace of the reaction vessel.
  • Various monomers including acrylates, methacrylates, acrylamides, and styrene were tested.

Main Results:

  • Controlled polymerization was achieved for a wide range of monomers.
  • Polymers exhibited low dispersities, near-quantitative conversions, and high end-group fidelity.
  • The method demonstrated scalability (ca. 125 g), tolerance to elevated temperatures, and compatibility with organic and aqueous media.

Conclusions:

  • The developed Cu0-RDRP system offers a robust and versatile approach to controlled radical polymerization.
  • This method simplifies polymerization by removing the need for deoxygenation and external additives.
  • The methodology is applicable to conventional ATRP and light-mediated polymerization techniques.