These results are in line with a recent study using Small Angle X-ray scattering in which the authors measured extrudate samples and observed isotropic and sub-micron anisotropic structure near core and skin, respectively . In another study using Small Angle Neutron Scattering (SANS), the authors observed that the nematic order parameter, which describes the sub-micron structural alignment, has a high value (anisotropic) near the skin, and a lower value near the core (isotropic), in both extrudates and deadstop samples. The higher the nematic order parameter, the more anisotropic the sample is at the length scale covered by SANS ranging from around 12-125 nm .