Abstract
Commercial polyacrylonitrile (PAN) fibers, widely used as carbon fiber precursors, were treated with ultraviolet (UV) light without any photo-initiators and its effects on the structural changes of PAN were investigated. Easily accessible UV irradiation produced free radicals by breaking the C–H bonding in PAN, leading to reducing cyclization temperature and activation energy. Dynamic mechanical analysis indicated a decrease in storage modulus of PAN fibers with increasing UV irradiation time below glass transition temperature. It is suggested that UV irradiation and the subsequent thermal treatment could offer an efficient stabilization by reducing the cyclization temperature and process time.
| Original language | English |
|---|---|
| Pages (from-to) | 47-51 |
| Number of pages | 5 |
| Journal | Journal of Industrial and Engineering Chemistry |
| Volume | 73 |
| DOIs | |
| State | Published - 2019.05.25 |
Keywords
- Dynamic mechanical analysis
- Polyacrylonitrile
- Stabilization
- Thermal properties
- Ultraviolet irradiation
Quacquarelli Symonds(QS) Subject Topics
- Engineering - Chemical
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