Performance-Guided Design of Chemically Recyclable Polymeric Materials: A Case Study on Thermoplastic Elastomers

Area of Science:

• Materials Science
• Polymer Chemistry
• Sustainable Chemistry

Background:

• Thermoplastic polymers, including elastomers, are widely used but face sustainability challenges.
• Current reviews on polymer recycling often lack functional classification, hindering application-focused research.
• Chemical recycling of polymers into monomers offers a sustainable solution.

Purpose of the Study:

• To propose a function-oriented classification for recyclable thermoplastic elastomers (TPEs).
• To review synthesis, properties, and chemical recycling of TPEs based on this new classification.
• To address the overlooked issue of monomer reuse and performance degradation in TPE recycling.

Main Methods:

• Classifying TPEs into polyurethanes, copolyesters, and polyolefins based on sequence control.
• Reviewing synthesis methods and properties of various TPEs.
• Analyzing depolymerization processes, conditions, and monomer recovery efficiency.

Main Results:

• A functional classification framework for recyclable TPEs is presented.
• Comparisons between novel and conventional TPEs regarding synthesis and properties are made.
• Depolymerization efficiencies and conditions for monomer recovery are detailed.

Conclusions:

• A function-oriented approach facilitates the study of recyclable TPEs for specific applications.
• Future research should focus on monomer reuse and mitigating performance degradation across recycling cycles.
• Cross-disciplinary collaboration is crucial for developing sustainable, next-generation TPEs.