【摘要】 利用基质辅助激光解吸电离飞行时间质谱(MALDI-TOFMS)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-TOFMS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-TOFMS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.更多还原

【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.更多还原