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Tuning Mechanical and Self-Healing Properties Using Multivalent Crosslinking
Sreecharan Ajjagola1, Alexis K Smith1, Dominik Konkolewicz1
1Department of Chemistry and Biochemistry, Miami University, Oxford, Ohio 45056, United States.
Macromolecules
|March 2, 2026
Summary
Researchers explored how using multivalent crosslinkers in polymer networks impacts material properties. Increasing crosslinker complexity enhanced mechanical and self-healing capabilities, offering new avenues for advanced material development.
Area of Science:
- Polymer Chemistry
- Materials Science
- Supramolecular Chemistry
Background:
- Dynamic crosslinking is crucial for material properties like toughness and self-healing.
- Previous studies focused on divalent crosslinkers in dynamic covalent networks.
- Multivalent crosslinkers offer a route to more complex polymer architectures.
Purpose of the Study:
- To investigate the effect of multivalent crosslinkers on polymer mechanical and self-healing properties.
- To explore the relationship between crosslinker valency and network complexity.
- To assess the potential for tuning material performance using varied crosslinker structures.
Main Methods:
- Utilized thiol-Michael "click" chemistry for thermoresponsive crosslinking.
- Employed di-, tri-, tetra-, and hexathiols as crosslinkers.
- Systematically varied crosslinker valency to create networks of increasing complexity.
Main Results:
- Mechanical properties, including toughness and tensile resistance, were tunable with multivalent crosslinkers.
- Enhanced self-healing capabilities were observed in polymer networks with higher crosslinker valency.
- The complexity of the polymer network directly influenced material performance.
Conclusions:
- Multivalent crosslinkers offer a versatile strategy for designing advanced polymer materials.
- Tuning crosslinker valency provides a method to optimize mechanical and self-healing properties.
- This research opens possibilities for novel self-healing elastomers and new chemical explorations.
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