Abstract
Heat-treatment processing of dry-jet wet-spun poly-(p-phenylene benzobisthiazole) fibres was undertaken to enhance fibre tensile mechanical properties. The effects of fibre tension and temperature and time of heat treatment in a nitrogen atmosphere on fibre mechanical properties were systematically investigated. Fibres possessing a tensile modulus as high as 300 GPa along with a tensile strength of 3 GPa have been produced. To attain this level of tensile properties, heat-treatment temperatures of 630 to 680° C for residence times of under one minute were required while applying tensions approaching fibre breaking stress at the elevated temperatures; conditions bordered on fibre degradation. Fibre structural changes associated with heat treatment and enchancement of mechanical properties are discussed in Part 2 of this work.
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Allen, S.R., Farris, R.J. & Thomas, E.L. High-modulus-high-strength poly-(p-phenylene benzobisthiazole) fibres. J Mater Sci 20, 2727–2734 (1985). https://doi.org/10.1007/BF00553034
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DOI: https://doi.org/10.1007/BF00553034