Aquivion® D98-25BS
ALDRICH/802557 - liquid, dispersion, 25% in water, PFSA eq. wt. 980 g/mole SO3H, contains CF3 polymer chain ends as stabilizer
Synonym: Aquivion® SO3H-form; Tetrafluoroethylene-
Linear Formula: (C4HF7O4S .C2F4)x
Product Type: Chemical
| composition | 25% in water |
| concentration | 25±1 % (w/w) |
| contains | CF3 polymer chain ends as stabilizer |
| eq. wt. | 980±40g/mole (SO3H) |
| form | dispersion |
| liquid | |
| greener alternative category | Enabling  |
| greener alternative product characteristics | Design for Energy Efficiency Learn more about the Principles of Green Chemistry . |
| Quality Level | 100 |
| sustainability | Greener Alternative Product |
| Application: | The superacidity of Aquivion® PFSA resins, combined with their high functional group concentration and electrochemical stability, makes them a critical ingredient in heterogeneous catalysts. Due to their excellent proton conductivity at low water uptake, these resins are frequently employed in research as ionomer binders within the catalyst layers of proton exchange membranes (PEM) for fuel cells and water electrolyzers. Additionally, they can be used in fabricating separator membranes (PEMs) either as stand-alone materials or reinforced with PTFE and are sometimes added to the surfaces of specialty fluoropolymers to enhance wettability. Aquivion® D98-25BS, with its short side chain and high equivalent weight, is a promising ionomer for balancing catalyst activity and stability. Ionomers with higher equivalent weights, such as D98-25BS, exhibit greater durability in long-term electrochemical stability tests. Moreover, D98-25BS ionomer catalysts can form smaller aggregates and agglomerates in certain catalyst systems. In these instances, the enhanced interaction between the catalyst and the D98-25BS binder can improve reaction kinetics, reduce overpotential, and enhance catalyst utilization compared to lower equivalent weight ionomers. |
| Features and Benefits: | • 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 for membranes or catalyst inks that are utilizing this dispersion material |
| General description: | Aquivion® PFSA dispersions are derived from a short-side-chain (SSC) copolymer of Tetrafluoroethylene and Sulfonyl Fluoride Vinyl Ether (SFVE), CF2=CF2-O-(CF2)2-SO2F, industrially produced by Syensqo Group. The resulting perfluoropolymer features functional groups in their sulfonic acid form (SO3H). Aquivion® D98-25BS is a perfluorosulfonic acid (PFSA) ionomer dispersion with an Equivalent Weight (EW) of 980 g/eq. The EW of an ionomer represents the weight of the polymer required to provide 1 mole of exchangeable protons, inversely related to the ion exchange capacity (IEC). This dispersion is chemically stabilized, with a significant proportion of polymer end groups converted to an inert trifluoromethyl (CF3) configuration, enhancing the polymer′s lifetime. Aquivion® D98-25BS contains a polymer concentration of 25 wt% in a solvent system that is over 99% water and free of ethers. |
| General description: | We are committed to bringing you Greener Alternative Products, which adhere to one or more of The 12 Principles of Greener Chemistry. This product has been enhanced for energy efficiency and is intended for use as Proton Exchange Membrane (PEM) Fuel Cells. Click here for more information. |
| Legal Information: | Aquivion is a registered trademark of Syensqo Group |
| Packaging: | 25, 250 mL in poly bottle |
| Symbol |  GHS05 |
| Signal word | Danger |
| Hazard statements | H314 |
| Precautionary statements | P280 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338 - P363 - P405 |
| RIDADR | UN 3265 8 / PGIII |
| WGK Germany | WGK 3 |
| Flash Point(F) | Not applicable |
| Flash Point(C) | Not applicable |
| UNSPSC | 26111700 |