Surface and thermodynamic properties of 1,3-dioxalane derivatives

Surface and thermodynamic properties of 1,3-dioxalane derivatives, non-ionics and anionic-non-ionic hybrids, in aqueous solution were studied at 20, 35 and 50 degrees C. This study includes the effect of polyoxypropylene chain length and temperature on the values of the critical micelle concentrations, maximum surface excess and minimum surface area of 2-acetonyl 2-methyl 4{[}alpha-(propyl poly-propenoxy ether) hexadecyl] 1,3-dioxalane (Ia-d) and 2-sodium carboxylatomethyl 2-methyl 4{[}alpha-(propyl polypropenoxy ether) hexadecyl] 1,3-dioxalane (IIa-d). Thermodynamic data obtained indicate that adsorption is preferable for 1,3-dioxalane non-ionic surfactants, and micellisation for the anionic-nonionic 1,3-dioxalane surfactants. (C) 1998 Elsevier Science B.V.