Ductile behavior and heat transfer efficiency in polymer extrusion by self-controlled “flipping melt-pancakes” with multi-fields synergy

•A novel design concept of “Flipping Melt-Pancakes” structures was proposed.•Torsional deformation yielded in the “Flipping Melt-Pancakes” structures.•Torsional ductile deformation contributes to heat and mass transfer.•Application of field synergy principle in polymer processing.