Abstract
A series of sodium polyoxypropylated lauryl sulfates (PPLS, adducts of 1, 3, 5, 10, 15 and 20 mol of propylene oxide) was synthesized and the change in their surface activities such as surface tension, foaming properties, wetting power, dispersing power and emulsifying power, by the difference in the number of moles of propylene oxide added, was discussed in comparison with sodium lauryl sulfate (SLS).
The surface tension and the cmc values of PPLS are lower than those of SLS. The foaming power and the foam stability of PPLS, excluding the case of 1 mol adduct, are inferior to those of SLS. The wetting, dispersing and emulsifying powers of PPLS having more than 3 mol of propylene oxide are superior to those of SLS.
PPLS are generally excellent surfactants.
