Journal of Research of the National Bureau of Standards Section A Physics and Chemistry · 1963 · 146 citations · 1 references
Natural SciencesMaterials EngineeringMaterials SciencePolymer ChemistryPolymer EngineeringPolymer MaterialsPolymer CharacterizationPolymer CrystallinityPolymer CrystallizationPolymer Physical ChemistryPolymer PhysicsPolymer ThermodynamicsChain FoldingCrystal Growth KineticsMeltingMelting Of Polymer MaterialsMelting TemperaturePolymer Crystallization KineticsPolymer Melting BehaviorPolymer Melts
The melting temperature of linear polyethylene has been obtained as a function of the time and temperature of crystallization. Recrystallization was minimized by a special melting procedure. By interpreting the melting points as characteristic of a given lamellar thickness, it was found that the thickness of crystals of appreciable age increased linearly with the logarithm of their time of existence. The lowest melting (i.e., thinnest) lamellae in a given specimen may be assumed to have either existed for only a short period of time, or to have been impeded in their growth in the chain direction, and they were found to have an estimated thickness close to that predicted by recent kinetic theories of polymer crystal growth with chain folding.
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