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Aquivion® PW98 is a coarse, acid powder that is based on the short-side-chain (SSC) copolymer of Tetrafluoroethylene and the Sulfonyl Fluoride Vinyl Ether (SFVE) CF2=CF-O-(CF2)2-SO2F produced by Solvay. The resulting perfluoropolymer's functional groups are in their sulfonic acid form, SO3H.
Aquivion® PW98 powder is based on the standard PFSA polymeric composition (meaning it is not chemically stabilized similar to Aquivion PW79S or PW87S), has an equivalent weight of 940 to 1020 g/eq and a high ionic exchange capacity. The total acid capacity of Aquivion® PW98 is 0.98 to 1.06 meq/g. It can be used as is under conditions where conventional exchange resins have shown insufficient chemical resistance.
Aquivion® PW98 exhibits ionic exchange capacity and it can be used as is under conditions where conventional exchange resins have shown insufficient chemical resistance. Given the resin's superacid functionality with many active groups it can also be used either directly or as an ingredient of composite structures active as heterogeneous catalysts. This encompasses a wide range of organic syntheses and respective reaction mechanisms. PW98 is characterized by a high degree of polymer crystallinity. It is insoluble in water, acid or bases and in most solvents unless extreme conditions are applied. It is insoluble in water, acid or bases and in most solvents unless extreme conditions would be applied. Aquivion® PW98 can be dissolved in some organic solvents to produce ion exchange capacity membranes. Proper organic solvents are dipolar aprotic such as N-ethyl-2-pyrrolidone (NEP) and dimethyl sulfoxide. To facilitate the dissolution, slightly increase the temperature to 50-60°C.
• Very high concentration of functional groups for strong proton (or Na+, K+, Li+, etc.) conductivity
• High softening point for high temperature operation well above 80 ºC
• Strong water retention for better fuel cell operation at low-humidity conditions
Aquivion® PFSA’s short side chain powder products make it possible to achieve either better mechanical properties at the same IEC (ion-exchange capacity) or a higher IEC at the same mechanical properties than long side chain (LSC) based PFSA powders. A comparison of Short Side Chain and Long Side Chain PFSA polymers from a polymeric composition is provided in the following image.
Properties that are provided on the FuelCellStore website are directly taken from the technical documentation sheets provided by the manufacturer for consideration as "typical properties" and not to be construed as specifications.
A typical lead time of 3-4 weeks is to be expected.
|Solvay Aquivion Powder|
|Equivalent Weight (EW)||940 to 1020 g/eq (Internal Method)|
|Total Acid Capacity||0.98 to 1.06 meq/g (Internal Method)|
|Water Content||5.0 wt%|
|Appearance||White colored powder|
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