The influence of the physical network of entangled molecules in molten, superhigh-molecular-weight poly(ethylene oxide) (PEO) on the formation and morphology of the crystals is described based on light and scanning electron microscopy, small-angle light scattering, and wide-angle X-ray diffraction. The morphology depends on the degree of the flow of the polymer melt. The flow is a temperature- and time-dependent process. Different spherulite like formations are formed. They are built from lamellae with [401] fold surfaces. The perfection of the crystallites also depends on the degree of flow.
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Nedkov et al. (1982) studied this question.
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