Compostable and Recyclable Baroplastic Triblock Copolymers Enable Low-Energy Polymer Processing

Area of Science:

• Polymer Science
• Materials Science
• Sustainable Chemistry

Background:

• Baroplastic polymers enable low-energy processing under mild pressure, preserving integrity and reducing microplastic residues.
• Poly(L-lactide)-block-poly(ethylene glycol)-block-poly(L-lactide) (PLLA-b-PEG-b-PLLA) triblock copolymers exhibit baroplasticity for ambient temperature processing.

Purpose of the Study:

• To synthesize and characterize PLLA-b-PEG-b-PLLA triblock copolymers with specific block lengths.
• To evaluate the compostability and recyclability of these baroplastic polymers.
• To explore the potential of low-temperature baroplastic processing for heat-sensitive materials.

Main Methods:

• Synthesis and characterization of PLLA-b-PEG-b-PLLA triblock copolymers.
• Assessment of degradation under industrial composting conditions.
• Evaluation of chemical and physical recyclability.
• Testing of protein activity preservation during baroplastic processing.

Main Results:

• Synthesized PLLA-b-PEG-b-PLLA copolymers demonstrated baroplasticity at ambient temperatures.
• Polymers showed rapid degradation within 2 months under industrial composting.
• Effective chemical and physical recyclability was confirmed.
• Low-temperature baroplastic processing preserved the activity of encapsulated heat-sensitive proteins.

Conclusions:

• PLLA-b-PEG-b-PLLA copolymers combine sustainable processing, compostability, and recyclability.
• These polymers present a promising platform for environmentally friendly applications in packaging and agriculture.
• Baroplastic processing offers a method for handling sensitive biomolecules within polymeric materials.