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Related Experiment Videos

Ultrasound Promoted Step-Growth Polymerization and Polymer Crosslinking Via Copper Catalyzed Azide-Alkyne "Click"

Hemakesh Mohapatra1, Jorge Ayarza1, Emily C Sanders2

  • 1Institute for Molecular Engineering, University of Chicago, 5640 South Ellis Avenue, Chicago, IL, 60637, USA.

Angewandte Chemie (International Ed. in English)
|July 12, 2018
PubMed
Summary

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Mechano-activated chemistry enables polymer remodeling. Piezochemical reduction of a copper pre-catalyst drives step-growth polymerization and crosslinking via copper-catalyzed azide-alkyne cycloaddition (CuAAC) to form polytriazoles and organogels.

Area of Science:

  • Polymer Chemistry
  • Materials Science
  • Mechanochemistry

Background:

  • Mechano-activated chemistry offers novel pathways for synthetic polymer modification.
  • Limited reactions are currently available for efficient mechanochemical polymer remodeling.
  • Developing new reactions is crucial for harnessing mechanical energy in materials.

Purpose of the Study:

  • To introduce a novel piezochemical approach for polymer synthesis and modification.
  • To demonstrate the utility of copper-catalyzed azide-alkyne cycloaddition (CuAAC) in mechanochemical reactions.
  • To explore the formation of linear polymers and crosslinked organogels using mechanical force.

Main Methods:

  • Piezochemical reduction of a Cu(II)-based pre-catalyst.
  • Copper-catalyzed azide-alkyne cycloaddition (CuAAC) polymerization.
Keywords:
copper “Click” reactionsmechanochemistrypiezochemical reactionspolymer crosslinkingstep-growth polymerizations

Related Experiment Videos

  • Mechanochemical crosslinking of pre-formed linear polymers.

    • Main Results:

    • Achieved step-growth polymerization via CuAAC under mechanical activation.
    • Synthesized linear polytriazole polymers.
    • Successfully crosslinked linear polymers into solid organogels using the same mechanochemical process.

    Conclusions:

    • Piezochemical reduction coupled with CuAAC provides a new route for mechanochemical polymer synthesis.
    • This chemistry allows for the transformation of linear polymers into crosslinked networks (organogels) via mechanical force.
    • The developed method holds potential for utilizing mechanical energy for constructive polymer material applications.