Orientations of polymer chains in lamellae PE chains are perpendicular to the lamellar surface Note: the lamellar thickness is 10 nm the chain length is >1000 nm >PE chains must be folded back and forth within the lamella!Orientations of polymer chains in lamellae ¾PE chains must be folded back and forth within the lamella! Note: the lamellar thickness is ~10 nm, ¾PE chains are perpendicular to the lamellar surface. 13 the chain length is > 1000 nm