Viscosity overshoot followed by steady state measured in uni-axial elongation of LDPE. Ole Hassager, Henrik Koblitz Rasmussen, Anders Bach and Jens Kromann Nielsen

Henrik Koblitz Rasmussen, Ole Hassager, Anders Bach, Jens Kromann Nielsen

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Abstract

The transient (e.g. start up of) elongational viscosity of three low-density polyethylene (LDPE) melts (BASF Lupolen 1810H, 1840D and 3020D) was measured using a filament stretching rheometer (FSR) capable of measuring at elevated temperatures. The transient uni-axial elongational viscosity showed an overshoot in the transient elongational viscosity followed by a steady viscosity, in all three materials. This phenomenon was observed at high elongational rates. The steady uni-axial elongational viscosity was about 40-50% less than the maximum in the transient uni-axial elongational viscosity in both the 1840D and the 3020D LDPE melt.
Original languageEnglish
Title of host publicationProceedings of The XIVth International Congress on Rheology
EditorsJae Wook Lee and Seung Jong Lee
Publication date2004
Publication statusPublished - 2004
EventXIV International Congress on Rheology - Seoul, Korea, Republic of
Duration: 22 Aug 200427 Aug 2004
Conference number: 14

Conference

ConferenceXIV International Congress on Rheology
Number14
CountryKorea, Republic of
CitySeoul
Period22/08/200427/08/2004

Cite this

Rasmussen, H. K., Hassager, O., Bach, A., & Nielsen, J. K. (2004). Viscosity overshoot followed by steady state measured in uni-axial elongation of LDPE. Ole Hassager, Henrik Koblitz Rasmussen, Anders Bach and Jens Kromann Nielsen. In J. W. L. A. S. J. L. (Ed.), Proceedings of The XIVth International Congress on Rheology http://www.ipl.dtu.dk/publikation/8342/dk/