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The cationic polymerization mechanism consists of three steps: initiation, propagation, and termination. In the initiation step of the polymerization process, the π bond of a monomer gets protonated by the Lewis acid catalyst, which is formed from boron trifluoride and water. The protonation of the π bond generates a carbocation stabilized by the electron‐donating group. In the propagation step, the π bond of the second monomer acts as a nucleophile and attacks the...
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Area of Science:

  • Polymer Chemistry
  • Supramolecular Chemistry
  • Materials Science

Background:

  • Polymerization-induced self-assembly (PISA) is crucial for nanomaterial fabrication.
  • Supramolecular chemistry offers advanced control over polymer assembly.
  • Integrating these fields can lead to novel functional materials.

Purpose of the Study:

  • To investigate the role of sulfone bonding in aqueous block copolymer (BCP) self-assembly via PISA.
  • To explore the stimuli-responsive properties of sulfone-functionalized BCP assemblies.
  • To engineer adaptive nanomaterials with programmable responses.

Main Methods:

  • Synthesized sulfone-functionalized acrylamide monomers for aqueous PISA.
  • Evaluated PISA behaviors by varying alkyl tail length.
  • Characterized the resulting polymer assemblies and their ion-responsive properties.

Main Results:

  • Sulfone moieties enhanced monomer solubility and stabilized assemblies.
  • Alkyl tail length modulated assembly behavior, balancing sulfone bonding and hydrophobicity.
  • Achieved programmable ion-responsive morphology transitions in polymer assemblies.

Conclusions:

  • Sulfone bonding plays a key role in directing aqueous BCP self-assembly within PISA.
  • The interplay between sulfone interactions and hydrophobicity allows for adaptive material design.
  • This strategy provides a versatile route to engineer functional, stimuli-responsive nanomaterials.