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Radiation-induced crosslinking of polyacrylonitrile fibers and the subsequent regulative effect on the preoxidation process
Liu, WH(刘伟华); Wang, MH(王谋华); Xing, Z; Qi, YN(戚英娜); Wu, GZ(吴国忠)
2012
Source PublicationRADIATION PHYSICS AND CHEMISTRY
ISSN0969-806X
Volume81Issue:6
AbstractTo investigate the radiation effect on polyacrylonitrile (PAN) fibers as well as on the preoxidation process, PAN fibers were irradiated by gamma-rays at room temperature at 50-500 kGy in vacuum and then were thermally oxidized in air. Gel fraction determination indicated that gamma irradiation led to the predominant crosslinking of PAN fibers, with G values (the number of event per 100 eV absorbed) of G(X) = 0.28 and G(S) = 0.16 for chain crosslinking and scission, respectively. It was found that irradiation caused a slight change in the crystal structure and tensile strength at low dose. Radiation led to a reduction of the onset temperature of cyclization reaction and moderated the exothermic behavior. The density of the PAN fibers after thermal oxidation was used to evaluate the preoxidation extent. It was proven that radiation could significantly accelerate the preoxidation process and consequently shortened the preoxidation time. Radiation crosslinking may have potential application in the production of PAN-based carbon fibers. (C) 2012 Elsevier Ltd. All rights reserved.
Language英语
Funding Project应物所项目组
WOS IDWOS:000303788300006
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/13273
Collection中科院上海应用物理研究所2011-2020年
Recommended Citation
GB/T 7714
Liu, WH,Wang, MH,Xing, Z,et al. Radiation-induced crosslinking of polyacrylonitrile fibers and the subsequent regulative effect on the preoxidation process[J]. RADIATION PHYSICS AND CHEMISTRY,2012,81(6).
APA Liu, WH,Wang, MH,Xing, Z,Qi, YN,&Wu, GZ.(2012).Radiation-induced crosslinking of polyacrylonitrile fibers and the subsequent regulative effect on the preoxidation process.RADIATION PHYSICS AND CHEMISTRY,81(6).
MLA Liu, WH,et al."Radiation-induced crosslinking of polyacrylonitrile fibers and the subsequent regulative effect on the preoxidation process".RADIATION PHYSICS AND CHEMISTRY 81.6(2012).
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