In the biomedical industry, polymers have been a real revolution due to their adjustable physicochemical properties and possibilities for biological functionalization, suitable for a wide range of applications. Depending on their chemical structure, they are divided into three macrocategories: thermoplastic polymers, hydrogels, and thermosetting polymers. The latter in particular are often used because of their excellent mechanical and thermal properties, good fatigue and creep resistance, and ease and speed of production. However, because of the irreversible chemical bonds created during the curing process, thermosets are inherently insoluble and infusible, making them particularly problematic in the recycling stage. For this reason, in recent decades, work has begun on a family of innovative polymers called CANs, which are formed from adaptable covalent networks capable of remolding due to external stimuli such as light or heat.