Update on fluoroelastomers: from perfluoroelastomers to fluorosilicones and fluorophosphazenes |
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Authors: | Bruno Ameduri Bernard Boutevin |
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Institution: | Laboratoire de Chimie Macromoléculaire, UMR 5076, Ecole Nationale Supérieure de Chimie de Montpellier, 8, Rue Ecole Normale, 34296 Montpellier Cedex 5, France |
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Abstract: | A survey of the synthesis, properties and applications of fluoroelastomers is reported falling into two main parts. After describing commercially available (per)fluorocarbon elastomers, fluoro-phosphazenes and silicones, recent data on hybrid fluorosilicones containing longer chains (often fluorinated) between silicon atoms are supplied. The second part deals with well-architectured fluoroelastomers. First, fluorinated thermoplastic elastomers obtained either by sequential iodine transfer polymerisation of fluoroalkenes (leading to triblock copolymers) or by a two-step procedure involving a monomer bearing peroxide that generated macroperoxides which thus produced graft copolymers. Then, multiblock copolymers were achieved either from telechelic perfluoropolyethers or from polyhydrosilylation of telechelic non-conjugated diene polyimides with fluorinated polyhybrid siloxane bearing Si-H end groups leading to exceptional materials. |
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Keywords: | Fluoroelastomers Fluorosilicones Fluorophosphazenes Fluorinated telomers Well-architectured fluoropolymers Fluorinated block copolymers Fluorinated graft copolymers |
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