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Sustainability in polyurethanes: old hat or new strategy for future developments?
Summary
This review examines sustainability challenges and emerging strategies for polyurethanes, covering bio-based building blocks, recyclable vitrimer formulations, and enzymatic or biodegradation end-of-life pathways as the industry moves toward greater circularity.
Polyurethanes are facing health and environmental problems related to their chemistry, processing and end-of-life management. This review summarizes the most recent strategies within the framework of sustainability and circularity related to the use of polyurethanes with low environmental impact, focusing on the possibility of performing their synthesis by replacing fossil-based building blocks with renewable ones, designing vitrimeric polyurethanes, and managing their end-of-life through enzymatic degradation or biodegradation processes.