Correlations between high-density polyethylene viscoelasticity and annular extrudate swell

C.F.J. Den Doelder, M. Mangnus, M.B. Kapur

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review


Extradate swell is a key performance contributor in extrusion blow molding. The relation between extrudate swell and rheometric material characteristics is non-trivial. It is studied here for a large set of high-density polyethylenes. Extrudate swell data are derived from photographic analysis on a lab-scale annular extrusion set-up, while rheometric parameters are obtained from dynamic spectroscopy, uniaxial elongation, creep and creep recovery experimentation. The annular set-up produces thickness and diameter swell data, which are found to depend in different ways on the material viscoelasticity. The former correlates well with recoverable or storage compliance, while the latter correlates well with the ratio of storage to loss modulus.

Original languageEnglish
Title of host publicationThe XVth International Congress on Rheology - The Society of Rheology 80th Annual Meeting
Publication statusPublished - 2008
Externally publishedYes
Event15th International Congress on Rheology - Monterey Conference Center, Monterey, United States
Duration: 3 Aug 20088 Aug 2008
Conference number: 15

Publication series

NameAIP Conference Proceedings


Conference15th International Congress on Rheology
Abbreviated titleICR 2008
Country/TerritoryUnited States
Internet address


  • HDPE
  • Polyethylene
  • Swell


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