TITLE:
Phase and Structural Transformation of Polyacrylonitrile Fiber during Two-Stage Thermal Stabilization
AUTHORS:
Alfiya G. Fazlitdinova, Vasiliy A. Tyumentsev
KEYWORDS:
Polyacrylonitrile Fiber, Thermal Stabilization, X-Ray Diffraction Analysis, Coherent Scattering Regions
JOURNAL NAME:
Journal of Materials Science and Chemical Engineering,
Vol.8 No.11,
November
27,
2020
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.