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Perfluoroalkoxy alkanes (PFA) are fluoropolymers.They are copolymers of tetrafluoroethylene (C 2 F 4) and perfluoroethers (C 2 F 3 OR f, where R f is a perfluorinated group such as trifluoromethyl (CF 3)).
The Professional Fraternity Association (PFA) is an American association of national, collegiate, professional fraternities and sororities that was formed in 1978. Since PFA groups are discipline-specific, members join while pursuing graduate (law, medicine, etc.) degrees as well as undergraduate (business, engineering, etc.) degrees.
PFA tubing is commonly used to handle aggressive chemicals Nafion is a fluoroether with strongly acidic sulfonic acid substituents Acyclic perfluoroethers are analogues of diethylether , e.g. O(C 2 F 5 ) 2 , such perfluoro(2-ethoxyethane)sulfonic acid (PFEESA).
Performic acid (PFA) is an organic compound with the formula CH 2 O 3. It is an unstable colorless liquid which can be produced by mixing formic acid with hydrogen peroxide . Owing to its oxidizing and disinfecting action, it is used in the chemical, medical and food industries.
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.
Application for membership to Phi Alpha Delta is available to undergraduate students, law school students, lawyers, judges, and politicians. [ 9 ] [ 10 ] Today, P.A.D. is one of the world's largest law fraternity, with 206 law school chapters, 99 alum chapters, and 316 pre-law chapters in the United States (including Puerto Rico ), Canada , and ...
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Paraformaldehyde (PFA) is the smallest polyoxymethylene, the polymerization product of formaldehyde with a typical degree of polymerization of 8–100 units. Paraformaldehyde commonly has a slight odor of formaldehyde due to decomposition.