Abstract
The effect of various surfactants on the soly. of methacrylic acid-based polyelectrolytes that are insol. in water at low pH, i.e. isotactic poly(methacrylic acid), i-PMA, Luviflex Soft and Luviflex Silk, was studied by surface tension, fluorescence spectroscopy, potentiometric titrn. and dynamic light scattering, DLS, measurements. Results show that Luviflex Silk and Luviflex Soft form ...
Abstract
The effect of various surfactants on the soly. of methacrylic acid-based polyelectrolytes that are insol. in water at low pH, i.e. isotactic poly(methacrylic acid), i-PMA, Luviflex Soft and Luviflex Silk, was studied by surface tension, fluorescence spectroscopy, potentiometric titrn. and dynamic light scattering, DLS, measurements. Results show that Luviflex Silk and Luviflex Soft form polymeric micelles in aq. solns. above a well-defined concn., whereas both i-PMA and Luviflex Soft undergo a pH-induced conformational transition. The crit. assocn. concn. values for each surfactant in the presence of completely ionized polyions were detd. Potentiometric and DLS measurements show that the addn. of an anionic and a nonionic surfactant significantly increases the soly. of the polymers at low pH, while the presence of a cationic surfactant results in a formation of an insol. polymer-surfactant aggregate. The present results could help in regulating the removal of hair-setting polymers by water.
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