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Perfluorosulfonic acids (PFSAs) are chemical compounds of the formula C n F (2n+1) SO 3 H and thus belong to the family of perfluorinated and polyfluorinated alkyl compounds (PFASs). The simplest example of a perfluorosulfonic acid is the trifluoromethanesulfonic acid .
One of the most common and commercially available PEM materials is the fluoropolymer (PFSA) [2] Nafion, a DuPont product. [3] While Nafion is an ionomer with a perfluorinated backbone like Teflon, [4] there are many other structural motifs used to make ionomers for proton-exchange membranes. Many use polyaromatic polymers, while others use ...
82765-76-2 Perfluorohexanesulfonamide: PFHxSA C 6 F 13 SO 2 NH 2: 399.13 41997-13-1 Perfluoroheptanesulfonamide: PFHpSA C 7 F 15 SO 2 NH 2: 449.14 82765-77-3 Perfluorooctanesulfonamide: PFOSA C 8 F 17 SO 2 NH 2: 499.14 754-91-6 Perfluorobutanesulfonyl fluoride: PFBSF C 4 F 9 SO 2 F 302.09 375-72-4 Perfluorooctanesulfonyl fluoride: PFOSF C 8 F ...
The common weight of a business card varies some by location. Generally, business cards are printed on stock that is 350 g/m 2 , 45 kg (100 lb) (weight), or 12 pt (thickness). The advent of personal laser and inkjet printers made it possible for people to print business cards at home, using specially designed pre-cut stock.
Freepik is a technology company specializing in AI tools for creating and editing audiovisual content. [1] The company provides AI-powered design tools, AI-generated images, and a growing collection of stock photos, illustrations, and vector graphics, operating under a freemium business model.
Trifluoroacetic acid is a widely employed acid, used for example in the synthesis of peptides.Its esters are useful in analytical chemistry. Longer-chain perfluoroalkyl carboxylic acids, e.g. with five to nine carbons, are useful fluorosurfactants and emulsifiers used in the production of polytetrafluoroethylene (Teflon) and related fluoropolymers.