Toward Reprocessable High-Performance Elastomer: Self-Assembly, Dynamic Covalent Chemistry, and Tailorable...

Area of Science:

• Materials Science
• Polymer Chemistry

Background:

• High-performance elastomers like polyurethanes are vital for demanding applications due to their toughness and flexibility, stemming from microphase-separated structures.
• Current challenges include meeting extreme operational demands and addressing sustainability concerns, particularly regarding end-of-life management and recyclability.

Purpose of the Study:

• To review integrated strategies combining microphase engineering and dynamic covalent chemistry in elastomers.
• To explore the potential for creating high-performance, recyclable elastomers for practical deployment.

Main Methods:

• Discusses advances in characterization methodologies and molecular design for optimizing elastomer properties.
• Highlights the role of dynamic covalent chemistry in enabling network topological rearrangement and reprocessability.
• Reviews the theoretical framework of covalent adaptable networks linking molecular exchange to macroscopic properties.

Main Results:

• Dynamic covalent chemistry allows for topological rearrangement in crosslinked networks without compromising integrity, enabling reprocessability.
• Incorporating dynamic covalent chemistry into polyurethane elastomers facilitates closed-loop recycling and sustainable nanocomposite design.
• These strategies retain the mechanical robustness and high performance of the elastomers.

Conclusions:

• Integrated approaches bridging microphase engineering and dynamic network chemistry are key to advancing high-performance, recyclable elastomers.
• Further research and development are needed to overcome challenges in the practical deployment of these sustainable materials.