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Abstract
In 1955 Jaccodine reported thin, spirally grown, lozenge-shaped lamellar crystals, namely single crystals, of a low molecular weight linear polyethylene (PE) from dilute benzene and xylene solutions.1 This work was extended to high molecular weights, independently, by Till,2 Keller3 and Fischer.4 These authors observed the morphology of PE single crystals under a transmission electron microscope (TEM). Keller, especially, clarified that molecular chains which are much longer than the lamellar thickness (∼ 10nm) must fold back and forth at the surface of the lamella.3 This suggestion had already been made as early as 1938 by Storks5, 6 but had passed unheeded.
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