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利用MALDI-TOF质谱技术研究MPEG-b-PCL两嵌段共聚物的嵌段长度及嵌段分布

路显锋1,2, 刘志强1, 邢俊鹏1, 刘淑莹1   

    1. 中国科学院长春应用化学研究所, 长春质谱中心, 长春 130022;
    2. 中国科学院研究生院, 北京 100039
  • 收稿日期:2007-10-24 修回日期:1900-01-01 出版日期:2008-06-10 发布日期:2008-06-10
  • 通讯作者: 刘淑莹

Investigation of Diblock Copolymers of Poly(ethylene glycol) Methyl Ether-block-Poly(ε-caprolactone) Using MALDI-TOF Mass Spectrometry Technique

LU Xian-Feng1,2, LIU Zhi-Qiang1, Xing Jun-Peng1, LIU Shu-Ying1*   

    1. Changchun Institute of Applied Chemistry, Changchun Center of Mass Spectrometry, Changchun 130022, China;
    2. Graduate School of the Chinese Academy of Sciences, Beijing 100039, China
  • Received:2007-10-24 Revised:1900-01-01 Online:2008-06-10 Published:2008-06-10
  • Contact: LIU Shu-Ying

摘要: 利用基质辅助激光解吸电离飞行时间质谱(MALDI-TOF MS)结合源后分解(PSD)技术对甲氧基封端的聚乙二醇-b-聚己内酯(MPEG-b-PCL)两嵌段共聚物进行了结构分析. 根据得到的MALDI-TOF MS谱图和PSD碎片信息清晰地确定了嵌段共聚物的嵌段长度和嵌段分布. 结果表明, 采用MALDI-TOF MS结合PSD技术研究这类嵌段共聚物链结构非常有效. 这为更好地认识和应用这类嵌段共聚物提供了重要的依据, 同时也建立了分析这类嵌段共聚物的方法.

关键词: 基质辅助激光解吸电离飞行时间质谱, 源后分解, 嵌段共聚物, 嵌段长度

Abstract: Poly(ethylene glycol) methyl ether-block-poly(ε-caprolactone)(MPEG-b-PCL) was analyzed by matrix-assisted laser desorption ionization time-of-flight mass spectrometry(MALDI-TOF MS) combined with post-source decay(PSD) technique. The block length and block distribution of the diblock copolymer were clearly determined. The results indicate that MALDI-TOF MS combined with PSD is an excellent method for the study of structures of block copolymer. It provided an important evidence for realizing and applying the diblock copolymer. Furthermore, the analysis method of the diblock copolymer was established.

Key words: Matrix-assisted laser desorption ionization time-of-flight mass spectrometry(MALDI-TOF MS), Post-source decay(PSD), Block copolymer, Block length

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