Dynamic surface tension studies of mixtures of hydroxypropylmethylcellulose with the double chain cationic surfactants didodecyldimethylammonium bromide and ditetradecyldimethylammonium bromide

- Adsorption kinetics up to several hours.
- Time-dependent synergistic effects.
- Two induction times are observed, 44 mN/m at the induction time II.
- Critical association concentrations estimated.