高等学校化学学报

高等学校化学学报 ›› 2006, Vol. 27 ›› Issue (1): 140.

• 研究论文 • 上一篇    下一篇

自由电子激光对芳香聚酰胺纤维热处理的研究

吴燕婕1,2, 杨丽敏4, 徐怡庄1, 杨学平3, 李永贵3, 王明凯3,    王笃金2, 吴瑾光1, 徐端夫1,2   

  1. 1. 北京大学化学与分子工程学院, 稀土材料化学及应用国家重点实验室, 北京 100871;
     2. 中国科学院化学研究所, 高分子物理与化学国家重点实验室, 高分子科学与材料联合实验室, 北京 100080;
    3. 中国科学院高能物理研究所, 北京 100080;
    4. 北京大学物理学院重离子物理研究所, 北京 100871
  • 收稿日期:2004-10-19 出版日期:2006-01-10 发布日期:2009-01-10
  • 通讯作者: 徐怡庄（1967年出生）, 男, 博士, 副教授, 主要从事分子光谱研究. E-mail: xyz@pku.edu.cn
  • 基金资助:

     国家自然科学基金（批准号: 50203001, 30371604）资助.

Application of  Free Electron Laser in Aramid Processing

WU Yan-Jie 1,2, YANG Li-Min4, XU Yi-Zhuang 1* , YANG Xue-Ping3, LI Yong-Gui3, WANG Ming-Kai3, WANG Du-Jin 2, WU Jin-Guang 1, XU Duan-Fu 1,2   

  1. 1. State Key Laboratory of Rare Earth Material Chemistry and Applications, 
    Department of Chemistry, Peking University, Beijing 100081, China;
    2. State Key Laboratory of Polymer Physics & Chemistry, Joint Laboratory of Polymer Science and Materials,
     Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China;
    3. Institute of High Energy Physics, Chinese Academy of Sciences,  Beijing 100080, China;
    4. Institute of Heavy Ion Physics, Peking University, Beijing 100871, China
  • Received:2004-10-19 Online:2006-01-10 Published:2009-01-10
  • Contact: XU Yi-Zhuang ,E-mail: xyz@pku.edu.cn

PDF (PC)

摘要：

用红外自由电子激光方法处理芳香聚酰胺纤维.  实验结果表明, 芳香聚酰胺纤维在自由电子激光辐照时在外力拉伸下可出现“缩颈”现象. 红外光谱研究结果表明, 经自由电子激光处理的芳香聚酰胺纤维样品未出现热裂解. 这种方法有可能发展成一种热处理芳香聚酰胺纤维的新方法.

关键词: 红外自由电子激光; 芳香聚酰胺纤维; 缩颈现象

Abstract:

Because the melting temperature of aramid is higher than its thermo\|decomposition temperature, processing of aramid fiber in the  molten state is not feasible. Here we propose an approach to process aramid fiber using infrared Free Electron Laser(FEL). The temporal structure of the FEL pulses allows the fiber to be excited to higher vibrational levels so that the polymer becomes soft enough to be processed without significant thermo-decomposition. Microscopic observation using convention optical microscope and polarized technique shows that \!necking phenomenon\" and re\|orientation occur on an aramid fibrous sample that was treated with FEL under external strain. In comparison with the the sample without treatment of FEL, significant changes are observable on the morphology of the broken aramid fiber treated with FEL. The above results strongly suggest that the aramid fiber is molten under the excitation of FEL. FTIR spectroscopic studies show that no thermal decomposition was observed on the aramid sample after FEL treatment. The above result may be helpful to develop a new way to process aramid in the future.

Key words: R-FEL; Aramid fiber; Necking phenomenon

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