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Theory and Simulation of Texture Formation in Mesophase Carbon Fibers

Published online by Cambridge University Press:  14 March 2011

J. Yan  and
A. D. Rey
J. Yan
Affiliation:
Department of Chemical Engineering, Mcgill University, 3610 University Street, Montreal, PQ H3A 2B2, Canada
A. D. Rey
Affiliation:
Department of Chemical Engineering, Mcgill University, 3610 University Street, Montreal, PQ H3A 2B2, Canada
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Abstract

Carbonaceous mesophases are spun into high performance carbon fibers using the melt spinning process. The spinning process produces a range of fiber textures whose origins are not well understood. Planar polar (PP) and planar radial (PR) textures are two ubiquitous ones. A model that describes the formation process of the PP texture based on the Landau-de Gennes mesoscopic theory for discotic liquid crystals, including defect nucleation, defect migration, and overall texture geometry, is presented, solved, and validated. The computed PP and PR textures phase diagram, given in terms of temperature and fiber radius, is presented to establish the processing conditions and geometric factors that lead to the selection of these textures. The influence of elastic anisotropy to the textures formation and structure is also characterized.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 702: Symposium U – Advanced Fibers, Plastics, Laminates and Composites , 2001 , U5.6.1
Copyright
Copyright © Materials Research Society 2002

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References

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