Hydrophobically modified polyelectrolytes: V. Interaction of fluorocarbon modified poly (acrylic acid) with various added surfactants

The interactions between fluorocarbon-modified poly(sodium acrylate) and va rious kinds of added sarfactants have been studied by means of viscometric measurement. Association behavior was found in both hydrogenated and fluori nated anionic, nonionic and cationic surfactants. Among them, the interacti ons between fluorocarbon-modified poly (sodium acrylate) and cationic surfa ctants are the strongest, owing to the cooperation of both electrostatic at tractions and hydrophobic associations. The anionic surfactants have the we akest effects on the solution properties because of the existence of unfavo rable electrostatic repulsion. The hydrophobic interactions between copolym ers and fluorinated surfactants are much stronger than those between copoly mers and hydrogenated surfactants.