Accelerating the stabilization of polyacrylonitrile fibers by UV irradiation

Title
Accelerating the stabilization of polyacrylonitrile fibers by UV irradiation
Authors
이성호손수영조아영정건영정용식
Keywords
Polyacrylonitrile; Ultraviolet irradiation; Stabilization; Thermal properties; Dynamic mechanical analysis
Issue Date
2019-05
Publisher
Journal of industrial and engineering chemistry
Citation
VOL 73-51
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 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.
URI
http://pubs.kist.re.kr/handle/201004/69701
ISSN
1226-086X
Appears in Collections:
KIST Publication > Article
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