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• W2003058574 abstract "The binding of the cationic surfactant dodecyltrimethylammonium bromide (DTABr) to the anionic polyelectrolyte dextran sulfate is studied by means of a solid-state-surfactant selective electrode in the temperature range 278–323 K. In all systems, the polymer equivalent concentration is 5 × 10−4m, the added NaCl concentration is kept constant at 0.01 m. The binding of DTA+ to dextran sulfate has been shown to be a highly cooperative process. The temperature dependence of the overall binding constant is found to be small but significant, exhibiting a maximum value between 298 and 303 K. ΔG0 of the binding process is relatively constant, varying monotonously from −22.6 kJ mol−1 at 278 K to −26.6 kJ mol−1 at 323 K. The standard entropy of binding decreases with increasing temperature, and the enthalpy of binding is endothermic at low temperature and exothermic at higher temperatures. All these observations show a close resemblance to the case of micellar aggregation of surfactants. In particular, the thermodynamic parameters for surfactant—polyion binding at low concentration reported here will be compared with the case of micelle formation of corresponding C12 surfactants." @default.
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• W2003058574 date "1985-01-01" @default.
• W2003058574 modified "2023-10-16" @default.
• W2003058574 title "A study of the temperature dependence of the binding of a cationic surfactant to an anionic polyelectrolyte" @default.
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• W2003058574 doi "https://doi.org/10.1016/0166-6622(85)80004-4" @default.
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