| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7824103 | Polymer Degradation and Stability | 2018 | 6 Pages |
Abstract
A microwave heating method was used for oxidative stabilization of polyacrylonitrile (PAN) fibers. The bulk density, chemical structure (FTIR), crystalline structure (WAXD), and skin-core structure were studied. The results show that the intermolecular cyclization happened above 220â¯Â°C. From X-ray diffractograms of heat treated fibers, the pre-graphitic structure of stabilized fibers was developed to turbostratic structure. A gradual densification of the fibers occurring was observed after stabilization at a maximum temperature of 240â¯Â°C. Microwave heating effectively shortened the thermal stabilization process and the thermal stabilization time by 35â¯min compared with the conventional thermal stabilization process. The skin-core structure of the stabilized fibers was prohibited by microwave heating.
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Authors
Jianhua Liu, Shijie Xiao, Zhigang Shen, Lei Xu, Libo Zhang, Jinhui Peng,