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One-Step Access to Sequence-Controlled Block Copolymers by Self-Switchable Organocatalytic Multicomponent

He-Yuan Ji1, Bin Wang1, Li Pan1

  • 1Tianjin Key Lab of Composite and Functional Materials, School of Materials Science and Engineering, Tianjin University, Tianjin, 300350, China.

Angewandte Chemie (International Ed. in English)
|November 13, 2018
PubMed
Summary
This summary is machine-generated.

A novel one-step method enables self-switchable block copolymerization of epoxides, anhydrides, and lactide using organocatalysts. This process allows for controlled synthesis of diverse block polyester polyols by switching polymerization cycles on or off.

Keywords:
block copolymerschemoselectivitymulticomponent reactionsorganocatalysisswitchable polymerization

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Area of Science:

  • Polymer Chemistry
  • Organic Synthesis
  • Materials Science

Background:

  • Block copolymers offer unique material properties.
  • Controlled synthesis of complex polymer architectures remains a challenge.
  • Multicomponent polymerization strategies are advancing polymer design.

Purpose of the Study:

  • To develop a one-step, self-switchable block copolymerization method.
  • To utilize simple organocatalysts for controlled polymerization.
  • To create diverse block polyester polyols from epoxides, anhydrides, and lactide.

Main Methods:

  • Developed a one-step multicomponent polymerization procedure.
  • Employed simple organocatalysts without external stimuli.
  • Integrated ring-opening alternating copolymerization of epoxides/anhydrides with ring-opening polymerization of lactide.

Main Results:

  • Achieved self-switchable terpolymerization of epoxides, anhydrides, and lactide.
  • Demonstrated control over polymerization by anhydride presence/absence.
  • Exhibited noncoordinating, living, and chemoselective polymerization behavior.
  • Synthesized various block polyester polyols by varying monomers and initiators.

Conclusions:

  • The developed method provides a versatile platform for synthesizing novel block polyester polyols.
  • The self-switchable nature offers precise control over polymer architecture.
  • Organocatalysis enables efficient and selective multicomponent polymerizations.