Structural factors determining the inhibitive effect of alkyl (aryl) ammonium salts of functionalized perfluoropolyethers

摘要

Thirty homologous series of functionalizedperfluoropolyethers (FP) based on alkyl(aryl)ammonium saltswere studied, by correlation analysis and statistical dataprocessing, as inhibiting Constituents of perfluoropolyetherlubricating greases. The basic adsorption and colloid-chemicalfactors responsible for the inhibitive effect of FPs are the highcritical micell concentration, surface activity, hydrophobicity, andformation of chemoadsorption complexes, in which FPs functionas electron-donating agents. Contributions from ten basicstructural factors of FPs (carboxylate and arylsulfonate anions,electronic structure of an anchor heteroatom, active hydrogenatoms of NH- and OH-acids in aliphatic and aromatic fragments,aliphatic radicals, aromatic fragment in an alkylammonium cation,etc.), influencing their inhibitive effect in low-polarity media,were quantitatively estimated.