| Abstract: | The nonionic surfactants polyoxyethylene nonyl phenol ethers have been used as models for the investigation of the change of the effective HLB of surfactants under influence of several hydroxy compounds using the phenol index method. These water-soluble additives include alcohols, glycols and glycol ethers. The change of the effective HLB of nonionic surfactant depends on the amounts and hydrophobicity of studied additives. In order to explain the change of the effective HLB of surfactants, the considerations based on the effects of the same additives on the micelle formation are also presented. These results are in remarkable agreement with the effects of the same substances on the effective HLB using other methods. |
