We have observed formation of polymer-surfactant films at the air interface having a range of structures, related to their solution interactions. The films form with biocompatible polymers, leading us to investigate biomedical applications. Unfortunately the surfactant mixtures are toxic and attempts to replace them by less harmful surfactants have met with limited success. Thus we are now investigating altering the polymer to assist retention of the initially templated mesostructure after surfactant removal by incorporating hydrophobic alkyl chains on the polymer backbone. These polymers are expected to hydrophobically associate with the surfactant micelles in solution. Here we aim to determine the form and extent of this interaction by investigating the effect of the hydrophobic alkyl chains on the shape and composition of the templating surfactant micelles through SANS measurements.