Orientation of mesophase pitch in capillary and channel flows
作者:
JohnJ. McHugh,
DanD. Edie,
期刊:
Liquid Crystals
(Taylor Available online 1995)
卷期:
Volume 18,
issue 2
页码: 327-335
ISSN:0267-8292
年代: 1995
DOI:10.1080/02678299508036629
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Analytical solutions to the Leslie-Ericksen equations are discussed for flow through a circular capillary and a rectangular channel. The analysis allows for a director component out of the flow-gradient plane. The resulting orientation profiles match the commonly observed textures of mesophase pitch-based carbon fibres, specifically the radial and line-origin textures. Thus, this formulation would appear to be correct for the flow of discotic mesophase pitches. Furthermore, the velocity profile for capillary flow suggests the possibility of measuring the Leslie coefficient α4for a mesophase pitch using a capillary rheometer.
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