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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 )).
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. Paraformaldehyde is a poly-acetal.
Skeletal structure of PFOS, an effective, persistent and bioaccumulative fluorosurfactant A physical sample of PFOA, appearing as a white solid as seen here in a relatively pure form. It is commonly referred to as the main harmful PFAS chemical and PFOA is responsible for many of the negative health effects commonly associated with PFAS.
PFA, meaning Please Find Attached / Attachment. Used in corporate emails to indicate that a document or set of documents is attached for the reference. PNFO, meaning Probably Not For the Office. Used in corporate emails to indicate that the content may be sexually explicit or profane, helping the recipient to avoid potentially objectionable ...
PFA, MFA [11] (perfluoroalkoxy polymer) Sold by AGC under the tradename Fluon PFA. Sold by DuPont under the tradename Teflon-PFA. Sold by Solvay Specialty Polymers under the tradename Hyflon. [12] Neoflon : PPVE + TFE: 305 FEP (fluorinated ethylene-propylene) Sold by DuPont under the tradename Teflon FEP. Also known as Neoflon and Hyflon
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.
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.