Sustainable Bio-Based Polyester: Advancing Self-Healing and Recyclability Through Covalently Adaptable Linkages ^†

The rising concern over plastic pollution and its long-term environmental consequences has intensified global efforts to discover sustainable alternatives to conventional synthetic polymers. In this study, we report on the development of fully bio-based dynamic polyester covalent adaptable networks (CANs), synthesized from renewable and environmentally friendly resources. These advanced polymeric systems incorporate dynamic covalent bonds that enable reversible chemical transformations, allowing the materials to be reprocessed, recycled, and even self-healed. Such features make them particularly attractive for sustainable material applications. This approach directly addresses the escalating accumulation of plastic waste, aiming to minimize its adverse impact on both the environment and human health. The polyester CANs developed here demonstrate adequate mechanical strength and can be reprocessed multiple times under mild conditions without significant loss of performance. Comprehensive material characterization confirms their structural integrity and adaptability across repeated recycling cycles. This work represents a significant advancement in polymer science, offering a pathway to reduce plastic waste while enhancing the functionality and lifecycle of materials. The findings underscore the potential of integrating bio-based sources with dynamic bonding strategies to create smart, durable polymers that align with circular economy principles. Overall, this study offers valuable insights into developing the next generation of environmentally responsible materials.