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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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