THE INFLUENCE OF STRUCTURAL CHANGES OF THE ETHOXYLATED SURFACTANTS ON THE SURFACE ACTIVITY

摘要

This work presents the results of a study concerning the synthesis of some ethoxylated surfactants, by improving the ethylene oxide addition catalytic system. Thus, using a selective catalyst based on barium salts of carboxylic acids, ethoxylated products having a narrow range distribution of the ethoxymers were prepared. A comparative study of the surface activity of ethoxylated surfactants with narrow distribution vs. Those having a broad distribution, obtained by alkaline catalysis, has emphasized the improvement of several characteristics (decrease of critical micelle concentration, reduction the foaming capacity). Depending on the surface activity, implications on the practical use of ethaxylated surfactants with narrow range distribution of the ethaxymers were presented.