Résumé
Poly-or perfluoroalkyl substances (PFASs) are divided into two main families, differentiated by their molecular weights (MWs). 1 The first one deals with non-polymers, oligomers or specific polymers bearing fluorinated side moieties. They have undergone major issues of bioaccumulation, persistency, toxicity and mobility, either intrinsically because of their low MWstructure or after some degradation (e.g., hydrolytic hydrolysis of ester functions in poly[(meth)acrylate]s releasing polyfluorinated groups). These specific PFASs are under severe restricted (several of them being banned) and drastic regulations are currently proceeding. In contrast, fluoropolymers (FPs), 2 endowed with outstanding properties and involved in High Tech applications are not prone to face such hazardous limitations. They have high molarmasses and are non-mobile, non-bioaccumulative, and non-toxic, hence fulfill the PLC criteria 3. Indeed, though the global production of FPs is only ca. 0.1% of plastics, its growth rate is 6-8%. 2 Much progress has been made in the last decade where several FP manufacturers have modified their production using non-fluorinated polymerization aids (or surfactants). 4 In addition, major actors working on the energetic transition are taking FPs more and more into account (fuel cell membranes, binders for Lithium ion batteries, backsheets for PVs, and electroactive FPs as keyexamples). Finally various companies have already found solutions to depolymerize, recycle ("close the loop" even on pilot plant) or reuse FPs 5 that will also be covered in that presentation. 4