Phase and Structural Transformation of Polyacrylonitrile Fiber during Two-Stage Thermal Stabilization

• 作者: Alfiya G. Fazlitdinova Vasiliy A. Tyumentsev
• 来源期刊: 材料科学与化学工程(英文)
• 学科: 工学
• 关键词: Polyacrylonitrile Fiber Thermal Stabilization X-Ray Diffraction Analysis Coherent Scattering Regions
• 年，卷（期）: 2020,（11）
• 页码范围: 54-63
• 页数: 10页
• 分类号: TG1

摘要

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.