title: A Versatile Strategy to Synthesize Perfluoropolyether-Based Thermoplastic Fluoropolymers by Alkyne-Azide Step-Growth Polymerization.
abstract: Perfluoropolyether (PFPE)-based thermoplastic fluoropolymers are synthesized by A2 + B2 step-growth polymerization between PFPE-diyne and fluorinated diazides. This versatile method allows synthesizing PFPE-based materials with tunable physicochemical properties depending on the exact nature of the fluorinated segment of the diazide precursor. Semicrystalline or amorphous materials endowed with high thermostability (≈300 °C under air) and low glass transition temperature (≈-100 °C) are obtained, as confirmed by differential scanning calorimetry, thermogravimetry, and rheometry. Step-growth polymerizations can be copper-catalyzed but also thermally activated in some cases, thus avoiding the presence of copper residues in the final materials. This strategy opens up new opportunities to easily access PFPE-based materials on an industrial scale. Furthermore, a plethora of developments can be envisioned (e.g., by adding a third trifunctional component to the formulations for the synthesis of PFPE-based elastomers).
authors.affiliation: Institut Charles Gerhardt, Equipe "Ingénierie et Architectures Macromoléculaires", UMR CNRS 5253, Université de Montpellier, Ecole Nationale Supérieure de Chimie de Montpellier, Montpellier, 34000, France.
authors.forename: Gérald
authors.initials: G
authors.lastname: Lopez
authors.affiliation: Institut Charles Gerhardt, Equipe "Ingénierie et Architectures Macromoléculaires", UMR CNRS 5253, Université de Montpellier, Ecole Nationale Supérieure de Chimie de Montpellier, Montpellier, 34000, France.
authors.forename: Bruno
authors.initials: B
authors.lastname: Ameduri
authors.affiliation: Institut Charles Gerhardt, Equipe "Ingénierie et Architectures Macromoléculaires", UMR CNRS 5253, Université de Montpellier, Ecole Nationale Supérieure de Chimie de Montpellier, Montpellier, 34000, France.
authors.forename: Jean-Pierre
authors.initials: JP
authors.lastname: Habas
mesh_terms: D000480:Alkynes / Q000737:chemistry; D001386:Azides / Q000737:chemistry; D004987:Ethers / Q000737:chemistry*; D005465:Fluorocarbon Polymers / Q000138:chemical synthesis* / Q000737:chemistry; D005466:Fluorocarbons / Q000737:chemistry*; D015394:Molecular Structure; D058105:Polymerization
chemical_list: D000480:Alkynes; D001386:Azides; D004987:Ethers; D005465:Fluorocarbon Polymers; D005466:Fluorocarbons; C078113:perfluoropolyether
keywords: click chemistry; perfluoropolyethers; physicochemical properties; step-growth polymerization; thermoplastics