Rheology and extrusion of medical‐grade thermoplastic polyurethane

Guangyu Lu; Dilhan M. Kalyon; Iskender Yilgor; Emel Yilgor

doi:10.1002/pen.10158

journal article Dec 01, 2003

Rheology and extrusion of medical‐grade thermoplastic polyurethane

Guangyu Lu

Dilhan M. Kalyon Iskender Yilgor

Emel Yilgor

Polymer Engineering & Science Vol. 43 No. 12 pp. 1863-1877 · Wiley

View at Publisher Save 10.1002/pen.10158

Abstract

AbstractThe selection of operating conditions and geometry for the processing of thermoplastic polyurethane, TPU, is a complicated task. This complication arises from the relatively high melting temperature of the crystalline hard blocks and the oxidative and thermal degradation and crosslinking that occur at temperatures that are relatively close to the melting temperature of the TPU. This article documents the rheology, extrusion, and structure development of a medical‐grade TPU. The medical application requires that the additives commonly utilized in the development of polymeric resins, i.e., stabilizers, antioxidants, and lubricant, should be minimized; the TPU of this study contains no additives. At temperatures 10–20°C lower than the melting temperature of the TPU, the morphology of the hard blocks continues to evolve to generate a reversible increase in elasticity and shear viscosity of the TPU with increasing time. At temperatures greater than the melting temperature, the TPU undergoes degradation and crosslinking reactions, which give rise to a permanent increase in the elasticity and the shear viscosity of the TPU. The ramifications of the degradation and crosslinking at temperatures greater than 200°C and morphology modification upon the continuing evolution of the hard blocks at temperatures less than 200°C on the rheology and processing were investigated.

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References

33

[1]

10.1002/app.1966.070101204

[2]

10.1080/00222346908205099

[3]

10.1002/app.1975.070190913

[4]

Schollenberger C. S. (1969)

[5]

10.1002/app.1979.070240912

[6]

10.1016/0032-3861(82)90411-6

[7]

10.1016/0032-3861(82)90392-5

[8]

10.1002/pol.1984.180220417

[9]

Meckel W. (1987)

[10]

Woods G. (1990)

[11]

10.1007/978-94-011-2924-4

[12]

10.1016/s0032-3861(99)00245-1

[13]

10.1002/app.1984.070290902

[14]

Noshay A. (1977)

[15]

10.1021/ma60031a008

[16]

10.1016/s0032-3861(97)10350-0

[17]

10.1021/ma00032a018

[18]

10.1021/ma00157a038

[19]

10.1080/00222348308224773

[20]

10.1021/ma00157a039

[21]

10.1002/polb.1986.090241107

[22]

10.1021/ma00047a010

[23]

10.1016/s0032-3861(00)00489-4

[24]

10.1007/978-1-4757-1436-4_4

[25]

Lelah M. D. (1986)

[26]

10.1021/ma0105993

[27]

10.1002/pol.1959.1203613015

[28]

10.1002/macp.1966.020910104

[29]

Tarakanov O. G. J. Polym. Sci. (1968)

[30]

R. J.Ferrari Rubber Age 53(1967).

[31]

Ma E. C. (1988)

[32]

Gauvin P. Makromol Chem. (1987)

[33]

10.1002/pen.760150603

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References

Details

Published: Dec 01, 2003
Vol/Issue: 43(12)
Pages: 1863-1877
License: View

Authors

Koc University

Koc University

Cite This Article

Guangyu Lu, Dilhan M. Kalyon, Iskender Yilgor, et al. (2003). Rheology and extrusion of medical‐grade thermoplastic polyurethane. Polymer Engineering & Science, 43(12), 1863-1877. https://doi.org/10.1002/pen.10158

Rheology and extrusion of medical‐grade thermoplastic polyurethane

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