Interaction between water-soluble polymers and azo dyes containing fluorine atoms

摘要: Abstract The interaction between sulphonated monoazo dyes containing trifluoromethyl groups at various positions to the azo linkage and poly( vinylpyrrolidone) was investigated by means of visible absorption spectrum measurements. positional effects on binding with poly(vinylpyrrolidone) are discussed using first constants thermodynamic parameters, compared results for corresponding methyl groups. show that position which attached benzene ring greatly affected behaviour, while such could not be observed in case Furthermore, one or two meta group gave nonlinear van't Hoff plots, suggesting behaviour these polyfvinylpyrrolidone ) is unusual.