Adsorption of Sodium Dodecyl Sulfate and Sodium Dodecyl Benzenesulfonate on Poly(Vinyl Chloride) Latexes

Hugo Vale (1) , Timothy Mckenna (1)

1 LCPP - Laboratoire de chimie et procédés de polymérisation

The adsorption of sodium dodecyl sulfate (SDS) and sodium dodecyl benzenesulfonate (SDBS) on poly(vinyl chloride) (PVC) latex particles was investigated. Conductometric titrations were performed to determine the area per surfactant molecule at various temperatures (20-50ºC) and the adsorption isotherms of both emulsifiers were determined at 20ºC from surface tension titration curves. The adsorption data show some deviation with respect to the Langmuir isotherm due to their slight S-shape. The data can nevertheless be fitted very well with a limiting form of the general adsorption equation proposed by Zhu and Gu (Adv. Colloid Interface Sci. 37 (1991) 1).

Mots clés: Adsorption isotherm; Langmuir isotherm; Latex; Poly(vinyl chloride); Tensiometry

Domaines: Autre

Hugo Vale, Timothy Mckenna. Adsorption of Sodium Dodecyl Sulfate and Sodium Dodecyl Benzenesulfonate on Poly(Vinyl Chloride) Latexes. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2005, 268, pp.68-72. ⟨10.1016/j.colsurfa.2005.05.061⟩. ⟨hal-00004745v2⟩