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Temperature Effects During Capillary Rheometry Testing



Anthony J. Bur, S C. Roth, H Lobo


A non-contact temperature monitoring technique based on fluorescence spectroscopy was used to measure the temperature of a polymer resin during capillary rheometry testing. Polyethylene and polycarbonate doped with a fluorescent dye, perylene, were used in experiments to measure resin temperature changes due to shear heating as shear rate in the capillary increased from 10 s-1 to 10000 s-1. Resin temperature at the exit orifice of a 1 mm diameter capillary die was found to increase monotonically with increasing shear rate reaching as much as 40 oC above the capillary set point temperature at the highest shear rates. The implications regarding rheometry testing are discussed.
Proceedings Title
Proceedings of the Annual Technical Meeting of the Society of Plastics Engineers
Conference Dates
May 1, 2002
Conference Location
San Francisco, CA
Conference Title
Society of Plastics Engineers. Technical Meeting


capillary rheometry, extrusion, fluorescence spectroscopy, optical sensor, shear heating, temperature


Bur, A. , Roth, S. and Lobo, H. (2002), Temperature Effects During Capillary Rheometry Testing, Proceedings of the Annual Technical Meeting of the Society of Plastics Engineers, San Francisco, CA, [online], (Accessed March 2, 2024)
Created May 1, 2002, Updated February 19, 2017