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    Process for the manufacture of carbon or graphite fibers (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: Carbon or graphite fibers are manufactured by heating polyacrylonitrile fiber materials in various solutions and gases. They are characterized in that the materials are heated to temperatures from 150 to 300 C in a solution containing one or more acids from the group of carbonic acids, sulfonic acids, and/or phenols. The original molecular orientation of the fibers is preserved by the cyclization that occurs before interlacing, which gives very strong and stiff carbon or graphite fibers without additional high temperature stretching treatments.
    Keywords: COMPOSITE MATERIALS
    Type: NASA-TM-75467
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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