Evaluation and analysis of pre-oxidation extent of polyacrylonitrile fiber

GU Hongxing; WANG Haojing; FAN Lidong; XUE Linbing; ZHAO Youjun

doi:10.11949/j.issn.0438-1157.20141369

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Evaluation and analysis of pre-oxidation extent of polyacrylonitrile fiber

更新时间：2025-12-10

- Evaluation and analysis of pre-oxidation extent of polyacrylonitrile fiber
- CIESC Journal Issue 3, Pages: 1228-1233(2015)
- 作者机构：
  
  1. 中国科学院西安光学精密机械研究所,陕西,西安,710119
  2. 中国科学院大学,北京,100049
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20141369
  CLC： Q342.74
- Online First：05 March 2015，
  
  Published：05 March 2015
- 稿件说明：
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GU Hongxing, WANG Haojing, FAN Lidong, et al. Evaluation and analysis of pre-oxidation extent of polyacrylonitrile fiber[J]. CIESC Journal, 2015, (3): 1228-1233.
DOI：

GU Hongxing, WANG Haojing, FAN Lidong, et al. Evaluation and analysis of pre-oxidation extent of polyacrylonitrile fiber[J]. CIESC Journal, 2015, (3): 1228-1233. DOI： 10.11949/j.issn.0438-1157.20141369.

摘要

为考察红外光谱与热分析对聚丙烯腈原丝预氧化程度表征的准确程度

用傅里叶变换红外光谱仪、综合热分析仪等对PAN原丝及其预氧丝进行了测试。对红外光谱测试中各影响因素进行了探讨

并依此对不同预氧丝的红外光谱及相对环化率进行了分析。对原丝及预氧丝在不同气氛下的热性能进行了比较

并对其环化度进行了分析。结果表明:红外光谱与热分析均能定性反映出预氧丝的预氧化程度

而定量计算出的相对环化率则不具可比性

环化度会较真实值偏高。

Abstract

Polyacrylonitrile (PAN) precursor fiber and pre-oxidized fiber were tested with Fourier transform infrared spectroscopy (FTIR) and differential scanning calorimetry (DSC) to investigate the accuracy of pre-oxidation extent which was measured by testing. On the basis of the study on influence factors during the FTIR test

FTIR spectra and relative cyclization index (RCI) were analyzed. Furthermore

aromatization index (AI) was also studied via comparing the thermal properties of precursor fiber and pre-oxidized fiber. The pre-oxidation extent of pre-oxidized fiber could be qualitatively evaluated by FTIR and DSC

while RCI by quantitative calculation was not comparable and AI was higher than the true value.

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