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April 8, 2026PolymerOpen Access

Synthesis and Characterization of Closed-Loop Chemically Recyclable Epoxy Thermosets Using Bio-Derived Imine-Containing Secondary Amine Hardeners

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Authors

ÖDÖzgün DağlarMBMidas BruensPSPatrick Schara

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Overview

This research demonstrates a new recyclable epoxy thermoset platform using bio-derived hardeners, enabling controlled depolymerization and substrate recovery.

Key Points

  • To develop a closed-loop chemically recyclable epoxy thermoset system using bio-derived imine-containing secondary amine hardeners.
  • Synthesize bio-derived secondary amine imine hardeners from renewable aromatic aldehydes.
  • Cure the hardeners with various epoxy monomers to create a library of epoxy thermosets.
  • Characterize the resulting epoxy networks for thermal and mechanical properties.
  • Evaluate acidic depolymerization to analyze the regeneration of the epoxy network.
  • The epoxy thermosets showed robust thermal and mechanical properties.
  • Acidic conditions enabled selective depolymerization into well-defined molecules.
  • Recycled materials displayed properties comparable to the virgin epoxy thermoset.
  • On-demand debonding was achieved in coating applications under acidic conditions.

Cite This Study

Dağlar et al. (2026) studied this question.

synapsesocial.com/papers/69d5efd374eaea4b11a796c6https://doi.org/10.1016/j.polymer.2026.129986
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