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RESEARCH PRODUCT
Morphology of melt-crystallized linear polyethylene fractions and its dependence on molecular weight and crystallization temperature
E. W. FischerLeo MandelkernI. G. Voigt-martinsubject
Morphology (linguistics)Materials scienceGeneral EngineeringPolyethyleneMicrostructurelaw.inventionLinear low-density polyethylenechemistry.chemical_compoundCrystallographychemistrylawLamellar structureCrystalliteCrystallizationSupercoolingdescription
Replicas and thin-section electron microscopic studies were made of fractions of linear polyethylene covering the molecular weight range 2.78 × 104 to 6.0 × 106 for a variety of crystallizing conditions. Lamellar crystallites were found under all circumstances; and the supermolecular structure, or crystalline morphology, is in agreement with that previously reported from an analysis of the small-angle light-scattering patterns of the same samples under similar crystallization conditions. Details of the crystalline microstructure are also described, which range from truncated hollow pyramids which degenerate as the molecular weight or the undercooling are increased. From these results, it is possible to describe the mechanism of formation of polyethylene spherulites.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1980-12-01 | Journal of Polymer Science: Polymer Physics Edition |