In plastics manufacturing, the morphology and crystallinity are important in the determination of the properties of the final product. They are influenced by several parameters, in particular the pressure and the temperature history during solidification. Therefore, the study of the influence of pressure and temperature on crystallization kinetics is important. In this study, the crystallization kinetics and the PVT behavior of various grades of polyethylene resins were evaluated and compared using a high-pressure dilatometer under both isothermal and isobaric conditions. Also, the PVT behavior was compared to the predictions of the Tait equation of state. It was found that polyethylene chain structure, as determined by branching and branching uniformity; influences nucleation, crystallization kinetics, and the effect of pressure an these processes. In addition, the results confirm the decrease of the surface free energy of the crystal nucleus with increasing pressure.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.21283 |
| Date | January 1999 |
| Creators | Capt, Ludovic. |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Master of Engineering (Department of Chemical Engineering.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 001656929, proquestno: MQ50594, Theses scanned by UMI/ProQuest. |
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