Accelerating the stabilization of polyacrylonitrile fibers by UV irradiation
- Accelerating the stabilization of polyacrylonitrile fibers by UV irradiation
- 이성호; 손수영; 조아영; 정건영; 정용식
- Polyacrylonitrile; Ultraviolet irradiation; Stabilization; Thermal properties; Dynamic mechanical analysis
- Issue Date
- Journal of industrial and engineering chemistry
- VOL 73-51
- 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 CH 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.
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