Pressure variation and flow birefringence of polymer melts in flows through straight ducts with approaching channel

1974 ◽  
Vol 13 (4-5) ◽  
pp. 859-863 ◽  
Author(s):  
T. Arai
Keyword(s):  
Polymer Melts ◽  
Pressure Variation ◽  
Flow Birefringence

Quasi-linear rheological behaviour of polymer melts: Comparison between mechanical and improved flow birefringence measurements

1980 ◽  
Vol 19 (2) ◽  
pp. 159-167 ◽  
Author(s):  
J. A. van Aken ◽  
F. H. Gortemaker ◽  
H. Janeschitz-Kriegl ◽  
H. M. Laun
Keyword(s):  
Polymer Melts ◽  
Rheological Behaviour ◽  
Flow Birefringence

A re-designed cone-and-plate apparatus for the measurement of the flow birefringence of polymer melts

1976 ◽  
Vol 15 (5) ◽  
pp. 242-255 ◽  
Author(s):  
F. H. Gortemaker ◽  
M. G. Hansen ◽  
B. de Cindio ◽  
H. Janeschitz-Kriegl
Keyword(s):  
Polymer Melts ◽  
Flow Birefringence ◽  
Plate Apparatus

scholarly journals Heat Flow Birefringence in Liquids and Liquid Crystals

1985 ◽  
Vol 40 (1) ◽  
pp. 3-7
Author(s):  
D. R. Baalss ◽  
S. Hess
Keyword(s):  
Heat Flow ◽  
Constant Pressure ◽  
Planck Equation ◽  
Pressure Variation ◽  
Flow Birefringence ◽  
Isotropic Phase ◽  
Constant Density ◽  
Collision Term ◽  
Nonspherical Particles ◽  
Physical Mechanisms

The alignment of nonspherical particles is inferred from the solution of a Fokker-Planck equation where a thermal torque has been taken into account which is proportional to the second spatial derivative of the temperature field. A pretransitional enhancement of the effect is predicted for the isotropic phase of a liquid crystal. Two distinct physical mechanisms are considered in order to estimate the magnitude of the thermal torque. One of them is due to the pressure variation at constant density. For constant pressure, the torque is inferred from the collision term of an Enskog-Boltzmann equation generalized to (strongly) nonspherical particles. In both cases, the resulting heat flow birefringence is of measurable size.

scholarly journals Sfudies on Flow Behavior of Polymer Melts by Flow Birefringence

1976 ◽  
Vol 4 (3) ◽  
pp. 111-119 ◽  
Author(s):  
Kazumori FUNATSU ◽  
Hisashi SHINOHARA
Keyword(s):  
Polymer Melts ◽  
Flow Behavior ◽  
Flow Birefringence
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