In the study, the research team identified three distinctive characteristic regimes with regard to the degree of slip at the interface and
revealed the underlying molecular mechanisms for each regime: (i) the z - to - x chain rotation mechanism in the vorticity plane in the
weak flow regime, which effectively diminishes the
wall friction against chain movement along the flow direction, (ii) the repetitive chain detachment - attachment (out - of - plane wagging) and disentanglement mechanism in the intermediate regime, and (iii) irregular (chaotic) chain rotation and tumbling mechanisms in the strong flow regime.