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Updated: Mar 3, 2026
09:06
Evaluation of the Curing of Adhesive Systems by Rheological and Thermal Testing
Published on: July 3, 2020
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Low-Viscosity, Dynamic Amidoamine Hardeners with Tunable Curing Kinetics for Epoxy Adhesives
Jonas Debuyck1, Bram Daelman1, Giulia Scurani2
1Polymer Chemistry Research Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Faculty of Sciences, Ghent University, Krijgslaan 281 S4, Ghent 9000, Belgium.
Macromolecules
|March 2, 2026
Summary
Researchers developed novel dynamic amidoamine (AA) hardeners with significantly reduced viscosity and tunable curing kinetics for epoxy systems. These advanced materials offer strong adhesion and excellent rebonding capabilities, paving the way for innovative adhesive technologies.
Area of Science:
- Polymer Chemistry
- Materials Science
- Adhesive Technology
Background:
- Traditional amidoamine (AA) hardeners suffer from irreversible cross-linking, limiting their application.
- Existing dynamic alternatives face challenges with high viscosity and inflexible curing kinetics.
- There is a need for advanced hardeners with controllable properties for improved adhesive performance.
Purpose of the Study:
- To develop novel dynamic amidoamine hardeners with significantly reduced viscosity.
- To enable tunable curing kinetics in amidoamine-epoxy systems.
- To create rebondable adhesive formulations with strong adhesion and versatile application.
Main Methods:
- Synthesized polysuccinamide- and polyglutarimide-based curing agents.
- Functionalized hardeners with secondary amine end-caps for dynamic cross-linking.
- Controlled viscosity by adjusting amidoamine chain length.
- Tuned curing kinetics via the chemical environment of the secondary amine.
Main Results:
- Achieved viscosity reduction of dynamic amidoamine hardeners by several orders of magnitude.
- Demonstrated tunable curing kinetics through chemical modification.
- Formulated bulk adhesives exhibiting strong adhesion (up to 11 MPa).
- Confirmed excellent rebonding capabilities of the developed epoxy systems.
Conclusions:
- A straightforward synthetic strategy yields versatile, low-viscosity dynamic amidoamine hardeners.
- These hardeners offer tunable curing kinetics and strong adhesive properties.
- The developed technology presents a drop-in solution for rebondable amidoamine-epoxy adhesives.
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