Interaction of sodium dodecylbenezen sulfonate with polymer as studied by surface tension, ESR and UV-vis spectroscopy

The interaction between sodium dodecylbenezen sulfonate(SDBS) and Poly(ethy lene oxide) (PEO) has been studied, using surface tension and dye solubiliz ation to determine the critical micelle concentration(CMC) without PEG, the critical aggregate concentration(cac) and polymer saturation concentration (c(2)) in the presence of FED. The structure of surfactant-polymer complexe s is analyzed by ESR and UV-vis spectra. For SDBS-PEO system, the result in dicates that ploymer-surfactant complexes have a more "open" structure than the ordinary micelles. The polymer molecules may penetrate into the palisa de of the micelles. Polyacrylamide(PAm) molecules remain in bulk solution a s free molecules, and do not interact with SDBS.