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Fluorinated, Crosslinkable Terpolymers Based on Vinylidene Fluoride and Bearing Sulfonic Acid Side Groups for Fuel-cell Membranes by L. Sauguet; B. Ameduri; B. Boutevin is a Materials Science article available to read on EtoBox.

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## Abstract The radical terpolymerization of 8‐bromo‐1__H,__1__H,__2__H__‐perfluorooct‐1‐ene with vinylidene fluoride (VDF) and perfluoro(4‐methyl‐3,6‐dioxaoct‐7‐ene) sulfonyl fluoride is presented. Changing the feed compositions of these three fluorinated comonomers enabled us to obtain different random‐type poly[vinylidene fluoride‐__ter__‐perfluoro(4‐methyl‐3,6‐dioxaoct‐7‐ene) sulfonyl fluoride‐__ter__‐8‐bromo‐1__H,__1__H,__2__H__‐perfluorooct‐1‐ene] terpolymers containing various sulfonyl fluoride and brominated side groups. Yields higher than 70% were reached in all cases. The hydrolysis of the sulfonyl fluoride group into the SO~3~Li function in the presence of lithium carbonate was quantitatively achieved without the content of VDF being affected, and so dehydrofluorination of the VDF base unit was avoided. These original terpolymers were then crosslinked via dangling bromine atoms in the presence of a peroxide/triallyl isocyanurate system, which produced films insoluble in organic solvents such as acetone and dimethylformamide (which totally dissolved uncured terpolymers). The acidification of SO~3~Li into the SO~3~H function enabled protonic membranes to be obtained. Th

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Author

L. Sauguet; B. Ameduri; B. Boutevin

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0887-624X)

Published

2006

Language

EN

Field

Materials Science (Physical Sciences)