However, from these simple DLS experiments, we only obtain apparent hydrodynamic sizes based on the assumption of spherical shape. It is however not unlikely that these self-assemblies indeed have a different morphology. The other triblock copolymer solutions had similar multimodal distribution as M A-pEtEtOx-A and M A-pPrMeOx-A. Important to note, while they had similar size distribution when freshly prepared, three sets of polymer solutions turned turbid after several days: M A-pPrMeOx-A solutions (10 g/L) were turbid at day 7, while A-p R PrMeOx-A and A-p S PrMeOx-A solutions (10 g/L) showed a slight turbidity after one month. On the contrary, A-p RS PrMeOx-A and all A-pEtEtOx-A series remained transparent and retained the same particle size distribution after one month (Fig. ). In order to investigate if the turbidity of M A-pPrMeOx-A, A-p R PrMeOx-A and A-p S PrMeOx-A DLS samples was caused by crystallization, XRD measurements were performed again after freeze-drying the corresponding polymers from cloudy water (Millipore) suspension, but no signals suggesting crystalline domains were found (Fig. ). Besides, the turbid DLS samples did not revert to transparent after storage at 4 °C for several days. This indicates that the turbidity of the triblock copolymer solutions is caused by selfassembly, and the thermoresponsive behavior of the hydrophobic block appears not to be sufficient to revert the self-assembly.