Oxidation Behavior of PAN-Based Fibers with a 2.45 GHz Microwave Cavity
Hung-Chun Hsu1*, Cheng-Hsien Chang1, Wen-Chang Huang1, Hsien-Wen Chao1, Tsun-Hsu Chang1
1Department of Physics, National Tsing Hua University, Hsinchu, Taiwan
* Presenter:Hung-Chun Hsu, email:z11452@yahoo.com.tw
This work presents a series oxidation of PAN-based fiber transforming into pre-oxidation stage under heating temperature processes which we proposed a 2.45 GHz microwave cavity to deal with. Compared with conventional heating, besides FTIR, XRD and SEM measurement, here we introduce enhanced-field method determining the complex permittivity to help us distinguish the oxidation progress of fiber in a fast and easy way. All the data shows that the microwave-heating fiber has better results than conventional heating one under the same oxidation temperature, including higher aromatic index (AI%), more smooth cross-section and not obvious sheath-core structure.

Keywords: polyacrylonitrile (PAN), microwave cavity, enhanced-field method, aromatic index (AI%), sheath-core structure