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- Title
PREDICTION OF POLYETHYLENE MOLECULAR WEIGHT AND MOLECULAR WEIGHT DISTRIBUTION USING CAPILLARY RHEOMETER.
- Authors
Todd, William G.; Olenius, Victor L.; Merrick-Mack, Jean A.
- Abstract
Polyethylene is characterized by molecular weight (MW), molecular weight distribution (MWD), and density. Melt index (MI2) is measured in the quality control (QC) lab and is used as an indication of resin MW. Melt flow ratio (MFR or MI20/MI2) is a calculated QC lab number, which is used as an indication of MWD. Density is a measure of crystallinity. This article shows that a capillary rheometer can provide a fast and reliable method on a production line to control MW and MWD by predicting MI2 and MI20 for a resin within specific ranges of density, melt index and equipment/catalysts.
- Subjects
POLYETHYLENE; MOLECULAR weights; DENSITY; QUALITY control; CRYSTALLINE polymers
- Publication
Journal of Plastic Film & Sheeting, 2008, Vol 24, Issue 3/4, p181
- ISSN
8756-0879
- Publication type
Article
- DOI
10.1177/8756087908096625