In order to evaluate the extent of thermal stabilization of polyacrylonitrile (PAN) fiber accurately,the relative cyclization ratio,cyclization index and bulk density of PAN fiber samples with different extent of stabilization were obtained by fourier transform infrared spectroscopy,differential scanning calorimetry and density gradient column methods,respectively.The characteristic and applicability of these evaluation methods were analyzed.The results indicated that the extent of thermal stabilization of PAN fiber can be qualitatively evaluated by the adopted methods.The relative cyclization ratio and bulk density of samples showed similar evolution trends which indicated they may quantitatively evaluate the extent of thermal stabilization of PAN fibers while cyclization index was only suitable for PAN fibers with lower extent of stabilization.
Yang Zhijun, Huang Youping, Ma Lei, Chang Huan, Ye Nanbiao, Guo Baochun, Huang Xianbo
. Evaluation on the extent of thermal stabilization of polyacrylonitrile fiber[J]. New Chemical Materials, 2021
, 49(9)
: 89
-92
.
DOI: 10.19817/j.cnki.issn 1006-3536.2021.09.019
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