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Phase and Structural Transformation of Polyacrylonitrile Fiber during Two-Stage Thermal Stabilization
Condensed Matter Physics Department, Physics Faculty, Chelyabinsk State University, Chelyabinsk, Russia
Condensed Matter Physics Department, Physics Faculty, Chelyabinsk State University, Chelyabinsk, Russia
- 1 Condensed Matter Physics Department, Physics Faculty, Chelyabinsk State University, Chelyabinsk, Russia
- 2 Condensed Matter Physics Department, Physics Faculty, Chelyabinsk State University, Chelyabinsk, Russia
Journal of Materials Science and Chemical Engineering·Volume 08 (2020)·Pages 54–63·Published 13 November 2020·DOI10.4236/msce.2020.811005
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Abstract
The influence of two-stage isothermal treatment on the change in the linear dimensions of the fiber, the average sizes of the coherent scattering regions, the texture and phase composition of the polyacrylonitrile fiber in the process of isothermal thermal stabilization is considered by the methods of dilatometry and X-ray diffraction analysis. It is shown that preliminary short-term heat treatment at a lower temperature affects the process of structural transformations of the polyacrylonitrile fiber material and the formation of a new highly dispersed phase of the thermally stabilized fiber.
KeywordsPolyacrylonitrile FiberThermal StabilizationX-Ray Diffraction AnalysisCoherent Scattering Regions
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