The processability of a resin in film blowing is strongly influenced by its flow behavior in extension. In this study, the suitability of the Sentmanat Extensional Rheometer (SER) and of a novel tester for polyethylene film resins was evaluated. The SER, which subjects the resin to simple extension, is simple and fast to use, requires a small quantity of sample and gives reliable data that can be used to detect differences in molecular weight, molecular weight distribution and levels of long-chain branching. The data are also related to the stability of the bubble in film blowing. The tester, on the other hand, is a simple device that generates biaxial extension by inflating a sheet into a bubble. The resulting pressure traces from this empirical test were found capable of differentiating resins on the basis of their flow in biaxial extension.
Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.83936 |
Date | January 2005 |
Creators | Tiang, Jen Shueng, 1977- |
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: 002271893, proquestno: AAIMR22675, Theses scanned by UMI/ProQuest. |
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