Technical and scientific activities of the period aimed to reach raw monomer purity optimization, advanced product processing, circular degradation testing, and sustainability modeling. The first phase focused on scaling up and improving the purity of the project's core bio-based building block. The consortium successfully synthesized and produced 2,5-furandicarboxylic acid (2,5-FDCA) at a purity of 99.9 wt%. To eliminate chemical contaminants that naturally impede long-chain polymer formation, researchers expanded a chemical esterification technique to turn raw FDCA into very pure furandicarboxylic acid dimethyl ester (DMF). Building on these high-purity inputs, structural work switched to customized polymer design for the three main industrial sectors. For flexible packaging in biomedical and electronics applications, eco-design concepts led the synthesis of four specific random copolymers and two homopolymers. Twin-screw extrusion was used to manufacture robust, UV-resistant PC/PEF and compatible PEF/PEN blends into clear interior camper display panels, while electrospinning processes were used to successfully transform antibacterial copolymers into functional cabin air filters. Synthesis in underwater contexts focused on unique resin frameworks for stereolithography-based 3D printing of aquatic sensors, elastomeric optical fiber, and fused deposition modeling of durable soft robotic grippers. A precise analytical procedure for targeted enzymatic hydrolysis was developed, resulting in 100% total depolymerization of furanic polymers back to their original starting components. Gamma irradiation treatments were observed to improve enzymatic breakdown kinetics in a dose-dependent manner, whereas recurrent mechanical extrusion loops proved PxF's structural durability during numerous physical recycling cycles. Simultaneously, these empirical physical parameters were used to construct an open-access database, that allowed, by machine learning algorithms to anticipate final physical features based on polymer processing factors. Cradle-to-gate LCA and LCC were optimized to maximize industrial scale-up emissions and recycling yields.
