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PFC.
Last seen on: Newsday.com Crossword – May 18 2019
Random information on the term “PFC”:
A perfluorinated compound (PFC) per- or polyfluoroalkyl chemical is an organofluorine compound containing only carbon-fluorine bonds (no C-H bonds) and C-C bonds but also other heteroatoms. PFCs, also known as perfluorinated chemicals, have properties that represent a blend of fluorocarbons (containing only C-F and C-C bonds) and the parent functionalized organic species. For example, perfluorooctanoic acid functions as a carboxylic acid but with strongly altered surfactant and hydrophobic characteristics. Fluorosurfactants are ubiquitously used in teflon, water resistant textiles and fire-fighting foam.
PFCs have properties that result from the presence of fluorocarbons (containing only C-F and C-C bonds) and the functional group. Common functional groups in PFCs are OH, CO2H, chlorine, O, and SO3H.
Perfluorinated compounds are used ubiquitously: For example, fluorosurfactants are widely used in the production of teflon and related fluorinated polymers. They have been used to confer hydrophobicity, stain-resistance to fabrics and as fire-fighting foam. Fluorosurfactants powerfully reduce surface tension by concentrating at the liquid-air interface due to the lipophobicity of fluorocarbons. Chlorofluorocarbons were formerly used as refrigerants until they were implicated in ozone degradation.