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4576811 Process for adjusting the fiber structure of mesophase pitch fibers

โœ Scribed by Dennis M Riggs; Hugh E Redick


Publisher
Elsevier Science
Year
1987
Tongue
English
Weight
98 KB
Volume
25
Category
Article
ISSN
0008-6223

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The transverse structure of pitch fiber has been successfully controlled by changing the pitch flow conditions at the upper portion of the capillary in spinning. The mean size of mesophase domains in the transverse section of pitch rod extruded from the capillary was found to decrease monotonously w

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review of viscosity data for mesophase pitches prepared by pyrolysis of petroleum or coal-tar pitches, or by chemical and thermal treatment of organic precursors ("chemical pitches"), finds that, although the apparent viscosities range widely, the temperature dependencies follow a regular pattern. M