Benzo-Fused Monomer Design toward Semiaromatic Polymers for a Circular Plastic Economy.

Area of Science:

• Polymer Chemistry
• Materials Science
• Sustainable Chemistry

Background:

• Growing plastic waste and fossil fuel consumption necessitate sustainable polymer alternatives.
• Chemically recyclable polymers offer a circular economy solution through monomer regeneration.
• Ring-opening polymerization (ROP) and ring-closing depolymerization (RCD) are key recycling mechanisms.

Purpose of the Study:

• To develop novel, chemically recyclable semiaromatic polymers.
• To investigate the impact of benzo-fusion on polymer recyclability and properties.
• To establish structure-polymerization thermodynamics relationships for advanced monomer design.

Main Methods:

• Employed a benzo-fusion strategy to design cyclic ester and lactam monomers.
• Utilized salicylic acid derivatives as aromatic building blocks for monomer synthesis.
• Developed stereo- and sequence-controlled polymerization techniques for tailored polymer architectures.

Main Results:

• Achieved efficient chemical recyclability in polyesters and polyamides via ROP/RCD.
• Demonstrated improved material properties (e.g., water resistance, transparency) in semiaromatic polymers.
• Established a link between benzo-fusion, microstructure, and enhanced recyclability.

Conclusions:

• The benzo-fusion strategy is effective for creating high-performance, chemically recyclable semiaromatic polymers.
• This approach facilitates the design of polymers with tunable properties and ideal circularity.
• The developed methods pave the way for next-generation sustainable engineering plastics.