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  3. Soft-segment-tuned Dynamic Polyurethanes With Low Compression Set And Recyclability.
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  3. Soft-segment-tuned Dynamic Polyurethanes With Low Compression Set And Recyclability.

Related Experiment Video

Synthesis of Soft Polysiloxane-urea Elastomers for Intraocular Lens Application
11:49

Synthesis of Soft Polysiloxane-urea Elastomers for Intraocular Lens Application

Published on: March 8, 2019

Soft-Segment-Tuned Dynamic Polyurethanes With Low Compression Set and Recyclability.

Rui Bai1, Yuepeng Wang1, Yingqian Li2

  • 1State Key Laboratory of Advanced Fibers Materials, College of Materials Science and Engineering, Research Base of Textile Materials for Flexible Electronics and Biomedical Applications (China Textile Engineering Society), Shanghai Key Laboratory of Lightweight Composite, Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative Medicine, Donghua University, Shanghai, P. R. China.

Macromolecular Rapid Communications
|June 23, 2026

View abstract on PubMed

Summary
This summary is machine-generated.

Researchers developed dynamic Diels-Alder cross-linked polyurethane elastomers (DAPU-EEs) that balance high performance and recyclability. These advanced materials offer improved mechanical properties and efficient reprocessing for sustainable applications.

Keywords:
Diels‐Alder reactiondynamic covalent cross‐linkinglow compression setpolyurethanerecyclable

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Area of Science:

  • Materials Science
  • Polymer Chemistry

Background:

  • High-performance polyurethane (PU) elastomers face a challenge balancing mechanical strength with recyclability.
  • Existing materials often compromise one property for the other.

Purpose of the Study:

  • To develop recyclable PU elastomers with high mechanical performance.
  • To investigate the structure-property relationships in PU elastomers with tailored soft segment ratios.
  • To create advanced materials for demanding sealing applications.

Main Methods:

  • Synthesized Diels-Alder (DA) dynamic covalently cross-linked PU elastomers (DAPU-EEs).
  • Precisely controlled polyether-to-polyester soft segment ratios.
  • Evaluated mechanical properties, thermal stability, and recyclability through hot-pressing cycles.

Main Results:

  • Optimized DAPU-EEs (DAPU-EE2) demonstrated excellent recyclability, retaining properties after multiple cycles.
  • Achieved a low compression set of 15%, outperforming commercial TPU sealing materials.
  • Exhibited superior solvent resistance and efficient processability with reduced viscosity.

Conclusions:

  • The developed DAPU-EEs offer a practical strategy for balancing mechanical performance and sustainable reprocessing.
  • These materials show significant potential for advanced sealing applications requiring durability and recyclability.