Nafion
Nafion is a sulfonated tetrafluoroethylene based fluoropolymer-copolymer discovered in the late 1960s by Walther Grot of DuPont. It is the first of a class of synthetic polymers with ionic properties which are called ionomers. Nafion's unique ionic properties are a result of incorporating perfluorovinyl ether groups terminated with sulfonate groups onto a tetrafluoroethylene (Teflon) backbone. Nafion has received a considerable amount of attention as a proton conductor for proton exchange membrane (PEM) fuel cells because of its excellent thermal and mechanical stability.
The chemical basis of Nafion's superior conductive properties remain a focus of research. Protons on the SO3H (sulfonic acid) groups "hop" from one acid site to another. Pores allow movement of cations but the membranes do not conduct anions or electrons. Nafion can be manufactured with various cationic conductivities.
Nomenclature and molecular weight
Nafion can be produced as both a powder resin and a copolymer. It has various chemical configurations and thus several chemical names in the IUPAC system. Nafion-H, for example, includes the following systematic names:
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No Fun
by: Iggy PopNo fun, my babe, no fun
No fun, my babe, no fun
No fun to hang around
Feeling that same old way
No fun to hang around
Freaked out for another day
No fun, my babe, no fun
No fun, my babe, no fun
No fun to be alone
Walking by my self
No fun to be alone
In love with nobody else
Well, maybe go out
Maybe stay home
Maybe call Mom
On the telephone
Well, come on, well, come on
Well, come on, well, come on
Well, come on, well, come on
Well, come on, well, come on
No fun to be alone
No fun to be alone
Hang on, don't let me go