Figure 5. Hypothetical structure of bundlelike lamellae.

(a) Isolated lamella with chains perpendicular to flat bundle ends. Light arrows show site of cumulative strain, “h” represents hypothetical step height. Dotted lines illustrate how crystal would round off end to reduce strain and total surface free energy.

(b) Isolated lamella with chains tilted with respect to flat bundle end. Cumulative strain is reduced, but “lamella” will grow in both G_l and G_r directions.

(c) Stacks of interconnected bundlelike “lamellae” with tilted chains.