Lee, Yejung Lee, Dong Hun Kim, Byung-Joo Chung, Yong-Sik Kim, Sung-Soo Lee, Sungho 2024-01-19T15:32:00Z 2024-01-19T15:32:00Z 2021-09-02 2021-02 1226-086X https://pubs.kist.re.kr/handle/201004/117456 The development of carbon structures in mesophase pitch fibers was studied with controlling the initial temperature (T-i) of the stabilization process to optimize the mechanical properties of final carbon/graphite fibers. To understand the relationship between T-i and chemical structural change by thermostabilization, the pitch fiber was thermally treated from various T(i)s up to 350 degrees C with an elevation rate of 2 degrees C/min. Various analyses of the oxygen species in the fiber revealed that changing T-i governed the amount and distribution of oxygen in the stabilized fibers, while determining the effective duration of thermostabilization and preserving hydroxyl groups originally present in the precursor fiber. Among various samples, stabilized fibers with T-i of 150 degrees C contained the largest amount of oxygen in the fiber, resulting in the highest degree of polyaromatic inner structure after the subsequent carbonization and graphitization to show the best tensile strength and modulus. We also demonstrated that the optimal mechanical, electrical, and thermal properties of the resulting graphite fiber were comparable to those of commercially available fiber products (XN-80-60s), indicating that T-i should be carefully considered to enhance the properties of carbon and graphite fibers. (C) 2020 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved. English 한국공업화학회 Enhancing physical properties of mesophase pitch-based graphite fibers by modulating initial stabilization temperature Article 10.1016/j.jiec.2020.11.013 1 Journal of Industrial and Engineering Chemistry, v.94, pp.397 - 407 Journal of Industrial and Engineering Chemistry 94 397 407 N scie scopus kci ART002686595 000609261000001 2-s2.0-85097168445 Chemistry, Multidisciplinary Engineering, Chemical Chemistry Engineering Article CARBON-FIBERS OXIDATIVE STABILIZATION SPUN POLYACRYLONITRILE GRAPHITIZATION CARBONIZATION OPTIMIZATION EVOLUTION OIL Mesophase pitch Graphite fiber Stabilization Initial temperature Mechanical property