Study on Interrelation Between Structure of Petroleum Sulfonates and Interfacial Activity

The study on the interrelation between the structures of petroleum sulfonates and interfacial activity, interfacial tension determination and mass spectrum analysis of twenty-five petroleum sulfonate samples from different sources or batches have been carried out. The experimental results showed that the amount of sulfonates with longer carbon chain such as C₁₇~C₂₅ plays a dominant role, the higher content of these components, the better interfacial activity of samples. When the sample molecular weight distributes evenly between 200~800, and when the molecular ion peaks with greatest abundance assemble at 479 or nearby the samples display better interfacial activity.