The drastic difference in the flow response can be attributed to the differing PII-2T fibril aggregation achieved by the two different solvents with the CB/DMF fibrils being both longer and more rigid than those in CB as corroborated by the freeze-dried imaging and SAXS. These long, rigid, and anisotropic aggregates and agglomerates have significantly longer orientational relaxation times, especially since this time scales with the length nearly to the power of 3, making them easier to align at low strain rates . In contrast, the fibril aggregates found in CB are shorter and more flexible, thus having shorter relaxation times and also requiring a degree of stretching prior to alignment . Despite this, at higher strain rates the fibril aggregation in CB is able to achieve a higher degree of flow-induced retardance compared to that in CB/DMF.