四种聚乙烯化物聚合物的区分,基于它们的终端组,通过DART-FT-ICRMS和肯德里克图表进行区分
Pierre Pacholski1,2, Sébastien Schramm2, Frédéric Progent1
1CEA, DAM, DIF, F-91297 Arpajon, France.
Journal of the American Society for Mass Spectrometry
|August 30, 2023
概括
直接实时质谱 (DART-MS) 分析聚乙烯化物 (PVDF) 聚合物,而不需要样本准备. 这种方法通过识别独特的末端组来有效地区分PVDF样本,揭示了对聚合过程的洞察力.
科学领域:
- 聚合物化学 聚合物化学
- 分析化学 分析化学
- 材料科学 材料科学 材料科学
背景情况:
- 像聚乙烯化物 (PVDF) 这样的合成聚合物在各种应用中至关重要.
- 传统的质谱技术 (例如,MALDI,ESI) 需要样本准备,限制不溶性或配方聚合物的分析.
- 直接实时 (DART) 电离为聚合物分析提供了一个无需样本准备的替代方案.
研究的目的:
- 为了分析四种不同的聚乙烯化物 (PVDF) 聚合物,使用DART里埃转变离子循环子共振质谱法 (FT-ICR MS).
- 调查DART-MS在PVDF聚合物的特性和基于终端组分析的区分方面的实用性.
- 通过识别和比较终端组结构来阐明聚合过程.
主要方法:
- 在负离子模式下使用DART FT-ICR MS对四个PVDF样本进行分析.
- 在特定的m/z范围内识别寡合离子 ([M - H]−,[M + O2]•−,[M + NO2]−).
- 肯德里克图的应用用于终端组的识别和样本的分化.
- 使用MS/MS和MS3实验来详细阐明末端组的结构.
主要成果:
- 对于分析的PVDF样本,DART-MS分析显示了明显的寡合分布.
- 肯德里克图表成功地根据其终端组公式区分了PVDF聚合物.
- 两个商业PVDF样本共享相同的终端组公式,表明一个共同的聚合路径.
- 另外两个PVDF样本显示出独特的末端组,明显区分它们与商业的末端组.
结论:
- DART FT-ICR MS是一种强大的,无需样本准备的技术,用于分析PVDF聚合物.
- 通过DART-MS进行终端组分析,提供了有关聚合过程的宝贵信息,并允许样本分化.
- 该研究成功地确定了不同的终端组结构,有助于更好地理解PVDF合成.
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