Evaluation and analysis of pre-oxidation extent of polyacrylonitrile fiber

doi:10.11949/j.issn.0438-1157.20141369

CIESC Journal ›› 2015, Vol. 66 ›› Issue (3): 1228-1233.DOI: 10.11949/j.issn.0438-1157.20141369

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Evaluation and analysis of pre-oxidation extent of polyacrylonitrile fiber

GU Hongxing^1,2, WANG Haojing¹, FAN Lidong¹, XUE Linbing¹, ZHAO Youjun¹

1 Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, Shaanxi, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China

Received:2014-09-10 Revised:2014-10-22 Online:2015-03-05 Published:2015-03-05
Supported by:
supported by the National Defense Science and Technology Innovation Project of Chinese Academy of Sciences (20130516).

聚丙烯腈预氧丝预氧化程度表征分析

顾红星^1,2, 王浩静¹, 范立东¹, 薛林兵¹, 赵佑军¹

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

通讯作者: 王浩静
基金资助:
中国科学院国防科技创新重点部署项目(20130516)。

Abstract

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.

Key words: polyacrylonitrile fiber, pre-oxidation extent, thermal property, analysis

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。

关键词: 聚丙烯腈预氧丝, 预氧化程度, 热性能, 分析

CLC Number:

TQ342.74

GU Hongxing, WANG Haojing, FAN Lidong, XUE Linbing, ZHAO Youjun. Evaluation and analysis of pre-oxidation extent of polyacrylonitrile fiber[J]. CIESC Journal, 2015, 66(3): 1228-1233.

顾红星, 王浩静, 范立东, 薛林兵, 赵佑军. 聚丙烯腈预氧丝预氧化程度表征分析[J]. 化工学报, 2015, 66(3): 1228-1233.

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Evaluation and analysis of pre-oxidation extent of polyacrylonitrile fiber

聚丙烯腈预氧丝预氧化程度表征分析

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