A calometric capillary for the measurement of viscous heating in tube flow of molten polymers

J. Laven; H. Janeschitz-Kriegl

A calometric capillary for the measurement of viscous heating in tube flow of molten polymers

J. Laven, H. Janeschitz-Kriegl

Materials and Interface Chemistry

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

2 Citations (Scopus)

Abstract

The design of a calorimetric capillary for use with a plunger-driven capillary rheometer is discussed. With this equipment it is possible to measure, during extrusion, the local radial heat flow out of the liquid through the wall of the capillary. From this, temperature gradients in the liquid can be derived. Results compare well (in case of PS) or reasonably well (in case of PE) with predictions from an analytical description of temperature distributions in power-law liquids as developed by the authors elsewhere. In the geometry used, the pressure dependence of viscosity and the decompression heating effect play an important role in the predictions. Melt flow anomalies (pulsated flow and melt fracture) are related to the measurement with the apparatus presented

Original language	English
Title of host publication	Progress and trends in rheology 2 : Proceedings of the Second Conference of European Rheologists, Prague, June 17–20, 1986
Editors	H. Giesekus, M.F. Hibberd
Place of Publication	Darmstadt
Publisher	D. Steinkopff-Verlag
Pages	197-199
ISBN (Print)	978-3-642-49339-3
Publication status	Published - 1988

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title = "A calometric capillary for the measurement of viscous heating in tube flow of molten polymers",

abstract = "The design of a calorimetric capillary for use with a plunger-driven capillary rheometer is discussed. With this equipment it is possible to measure, during extrusion, the local radial heat flow out of the liquid through the wall of the capillary. From this, temperature gradients in the liquid can be derived. Results compare well (in case of PS) or reasonably well (in case of PE) with predictions from an analytical description of temperature distributions in power-law liquids as developed by the authors elsewhere. In the geometry used, the pressure dependence of viscosity and the decompression heating effect play an important role in the predictions. Melt flow anomalies (pulsated flow and melt fracture) are related to the measurement with the apparatus presented",

author = "J. Laven and H. Janeschitz-Kriegl",

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editor = "H. Giesekus and M.F. Hibberd",

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A calometric capillary for the measurement of viscous heating in tube flow of molten polymers. / Laven, J.; Janeschitz-Kriegl, H.

Progress and trends in rheology 2 : Proceedings of the Second Conference of European Rheologists, Prague, June 17–20, 1986. ed. / H. Giesekus; M.F. Hibberd. Darmstadt : D. Steinkopff-Verlag, 1988. p. 197-199.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

TY - GEN

T1 - A calometric capillary for the measurement of viscous heating in tube flow of molten polymers

AU - Laven, J.

AU - Janeschitz-Kriegl, H.

PY - 1988

Y1 - 1988

N2 - The design of a calorimetric capillary for use with a plunger-driven capillary rheometer is discussed. With this equipment it is possible to measure, during extrusion, the local radial heat flow out of the liquid through the wall of the capillary. From this, temperature gradients in the liquid can be derived. Results compare well (in case of PS) or reasonably well (in case of PE) with predictions from an analytical description of temperature distributions in power-law liquids as developed by the authors elsewhere. In the geometry used, the pressure dependence of viscosity and the decompression heating effect play an important role in the predictions. Melt flow anomalies (pulsated flow and melt fracture) are related to the measurement with the apparatus presented

AB - The design of a calorimetric capillary for use with a plunger-driven capillary rheometer is discussed. With this equipment it is possible to measure, during extrusion, the local radial heat flow out of the liquid through the wall of the capillary. From this, temperature gradients in the liquid can be derived. Results compare well (in case of PS) or reasonably well (in case of PE) with predictions from an analytical description of temperature distributions in power-law liquids as developed by the authors elsewhere. In the geometry used, the pressure dependence of viscosity and the decompression heating effect play an important role in the predictions. Melt flow anomalies (pulsated flow and melt fracture) are related to the measurement with the apparatus presented

M3 - Conference contribution

SN - 978-3-642-49339-3

SP - 197

EP - 199

BT - Progress and trends in rheology 2 : Proceedings of the Second Conference of European Rheologists, Prague, June 17–20, 1986

A2 - Giesekus, H.

A2 - Hibberd, M.F.

PB - D. Steinkopff-Verlag

CY - Darmstadt

ER -