Polymeric Nonionic Surfactants as a Pour Point Depressant

Polymeric nonionic surfactants with the same hydrophobic moieties C₁₈E₆₈ and C₁₈E₁₃₆ were prepared. The surface properties of the synthesized surfactants and the critical micelle concentration, surface excesses concentration and the minimum surface area were evaluated and discussed. The efficiency of the prepared polymeric surfactants as pour point for fuel oil was discussed in absence and in presence of commercial additive. The most of the prepared additives showed a good performance toward improving the flow properties of the tested fuel oil. Then the rheological data were further determined through shear rate-viscosity measurements.