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Depolymerization-Induced Morphological Transformation.

Nethmi De Alwis Watuthanthrige1, Victoria Lohmann1, Viviane Lutz-Bueno2

  • 1Laboratory for Sustainable Polymers, Department of Materials, ETH Zurich, Vladimir-Prelog-Weg 5, 8093 Zürich, Switzerland.

Journal of the American Chemical Society
|January 26, 2026

View abstract on PubMed

Summary
This summary is machine-generated.

This study introduces depolymerization-induced morphological transformation (DIMT) for controlling copolymer nanoparticle shape. This method offers new avenues for chemical recycling beyond monomer recovery.

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Area of Science:

  • Polymer Chemistry
  • Materials Science
  • Chemical Recycling

Background:

  • Depolymerization is key for vinyl polymer chemical recycling.
  • Current methods primarily focus on monomer recovery, limiting broader applications.
  • Opportunities exist to leverage depolymerization for advanced material transformations.

Purpose of the Study:

  • Introduce depolymerization-induced morphological transformation (DIMT) as a novel methodology.
  • Control the shape evolution of sterically stabilized diblock copolymer nanoparticles.
  • Investigate the mechanisms of morphological changes during selective polymer degradation.

Main Methods:

  • Utilized selective degradation of a methacrylic core-forming block within diblock copolymers.
  • Employed transmission electron microscopy (TEM) for morphological analysis.
  • Applied small-angle X-ray scattering (SAXS) to understand structural evolution.

    • Main Results:

    • Demonstrated sequential morphological transformations: vesicles to worms to spheres.
    • Developed a predictive (pseudo)phase diagram for copolymer morphology.
    • Successfully applied DIMT to irreversible degelation of diblock copolymer worm gels.

    Conclusions:

    • DIMT provides a modular approach to control copolymer morphology via depolymerization.
    • This methodology expands the scope of chemical recycling beyond monomer recovery.
    • DIMT offers new strategies for regulating material properties and creating advanced polymer architectures.