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Advances in Toughening Modification Methods for Epoxy Resins: A Comprehensive Review
Jiawei Zhang1, Zhen Zhang2, Ran Huang3,4,5
1School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai 201418, China.
Polymers
|May 14, 2025
Summary
This review details epoxy resin toughening methods, including rubber and nanoparticle additions, to enhance fracture toughness. Synergistic effects and future directions for industrial applications are explored.
Area of Science:
- Materials Science
- Polymer Chemistry
Background:
- Epoxy resins are widely used but suffer from inherent brittleness.
- Improving fracture toughness is crucial for expanding their applications.
Purpose of the Study:
- To comprehensively review recent advancements in epoxy resin toughening modification methods.
- To analyze the mechanisms, synergistic effects, and challenges of various toughening strategies.
Main Methods:
- Review of literature on incorporating liquid rubbers, core-shell rubber particles, thermoplastic resins, hyperbranched polymers, and nanoparticles.
- Analysis of reaction-induced phase separation, crack pinning, and energy dissipation mechanisms.
- Examination of synergistic effects from combined toughening agents.
Main Results:
- Various methods significantly improve mechanical properties and fracture toughness of epoxy resins.
- Synergistic combinations, like phenoxy thermoplastic rubber and core-shell rubber, enhance critical fracture energy and impact strength.
- Challenges include potential reductions in other mechanical properties and phase separation impacts.
Conclusions:
- Diverse toughening strategies are effective for epoxy resins.
- Future research should focus on optimizing techniques for industrial applications.
- Computational modeling and machine learning show promise for predictive design.
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