Fig. 3: Analysis of molecular chain orientations.
From: Reassessing chain tilt in the lamellar crystals of polyethylene
a Reconstructed dark-field (DF)-STEM image of HDPE. White triangles mark the locations from which the ED patterns shown in Fig. 2c–f were extracted, and red frames denote the analysed regions. b Map of the chain orientation angles in the Cartesian coordinate system (absolute molecular-chain orientations). c Straight and d, curved lamellae with a uniform chain orientation extracted from the left and central parts of Region 7 in (b), respectively. e Straight lamella with gradually changing chain orientations extracted from the upper-right part of Region 7 in (b). f Lamellae with two different chain orientations extracted from the central part of Region 5 in (b). g Lamellae corresponding to Region 2 in (b), of which 1, 2, and 3 are nonparallel, whereas 4 is stacked.
