Properties and structure of polyacrylonitrile fibers |
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| Authors: | A. T. Kalashnik T. N. Smirnova O. P. Chernova V. V. Kozlov |
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| Affiliation: | 1.MISIS National University of Science and Technology,Moscow,Russia;2.Faculty of Chemistry,Moscow State University,Moscow,Russia;3.Topchiev Institute of Petrochemical Synthesis,Russian Academy of Sciences,Moscow,Russia |
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| Abstract: | With the use of the methods of dynamic mechanical analysis and thermomechanical analysis, the structural transformations of polyacrylonitrile fibers during heating are studied. It is shown that, regardless of the degree of macromolecule orientation, the fibers not exposed to heating are characterized by an amorphous ordered structure with an ordered mesophase. During heating, the fiber acquires a single-phase structure owing to transition of the amorphous component to the mesophase. |
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