Influence of electron-beam irradiation on thermal stabilization process of polyacrylonitrile fibers

• Published in: Journal of industrial and engineering chemistry (Seoul, Korea) Vol. 20; no. 4; pp. 1875 - 1878
• Main Authors: Park, Mira, Choi, Yuri, Lee, Seul-Yi, Kim, Hak-Yong, Park, Soo-Jin
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 25.07.2014; 한국공업화학회
• Subjects: Cyclization behaviors; Differential scanning calorimetry; Electron-beam irradiation; Exothermic reactions; Fibers; Irradiation; Polyacrylonitrile precursor fibers; Polyacrylonitriles; Stabilization; Thermal behaviors; Thermal properties; Transformations; 화학공학; Polyacrylonitrile precursor fibers; Cyclization behaviors; Electron-beam irradiation; Stabilization; Thermal behaviors
• ISSN: 1226-086X; 1876-794X
• DOI: 10.1016/j.jiec.2013.09.006

In this work, we prepared polyacrylonitrile (PAN)-based fibers treated with different doses of electron (E)-beam irradiation during the oxidative stabilization process to investigate the effect on their thermal behaviors and molecular structures. FT-IR and UV–vis absorption spectra of the E-beam irradiated PAN fibers show varying conjugation and transformation of CN to CN groups as a function of the dose. The thermal properties were characterized using differential scanning calorimetry and thermogravimetric analysis. E-beam irradiation lowers the onset temperature, extends the exothermic reaction, and improves the thermal stabilization. From these results, it is concluded that E-beam irradiation improves the thermal properties of PAN fibers as a result of cyclization of PAN molecules.