SEARCH Articles Figures Tables Extrudate swell Reynolds number Extrudate swell of immiscible polymer blends Extrudate swell region Extrudate swell swelling Extrudate swell swelling Extrudate swelling Extrudate swelling Polymer rheology extrudate swelling Polystyrene extrudate swell Rheology extrudate swell Viscoelasticity extrudate swell