Use of telechelic fluorinated diiodides to obtain well-defined fluoropolymers |
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Authors: | B Amduri B Boutevin |
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Institution: | Laboratory of Macromolecular Chemistry, UMR 5076 (CNRS), Ecole Nationale Supérieure de Chimie, 8 Rue de l’Ecole Normale, 34296 Montpellier Cedex 5, France |
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Abstract: | Different methods of synthesis involved in the preparation of fluorinated telechelics (or ,ω-difunctional compounds) from ,ω-diiodoperfluoroalkanes for obtaining well-defined fluoropolymers are described. This review focuses on molecules in which fluorinated chains are located on the backbone and not in a lateral position. First, a bibliographical approach develops the syntheses of ,ω-diiodoperfluoroalkanes (1) either by chemical transformations of telechelic derivatives or by telomerisation of fluoroolefins with molecular iodine or diiodoperfluoroalkanes. Then, fluorotelechelics are synthesised by means of four different processes: (a) by the chemical change in the presence of metalic salts; (b) from the bismonoaddition of 1 to ω-functional unsaturated derivatives; (c) from the bis(monoethylenation) of 1 followed by difunctionalisation (e.g., nucleophilic substitution); (d) from the coupling reactions between 1 and -iodo-ω-functional reactants. Finally, this review describes how several well-defined fluoropolymers can be produced from these fluorinated telechelics. Their specific chemical, physical and thermal properties are discussed with regard to modern industrial requirements. |
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Keywords: | sciencedirect com/scidirimg/entities/204e " target="_blank">gif" alt="greek small letter alpha" title="greek small letter alpha" border="0"> ω-Diiodides Telechelics Fluorinated functional compounds Radical Fluoropolymers |
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