Quantitative product spectrum analysis of poly(butyl acrylate) via electrospray ionization mass spectrometry
Quantitative product spectrum analysis of poly(butyl acrylate) via electrospray ionization mass spectrometry
复制标题
通过电喷雾电离质谱法对聚丙烯酸丁酯进行定量产物谱分析
DOI：
10.1021/ma801196w
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发表时间：
2009
期刊：
影响因子：
5.5
通讯作者：
C. Barner‐Kowollik
中科院分区：
文献类型：
--
作者：
Sandy P. S. Koo;Thomas Junkers;C. Barner‐Kowollik
电喷雾电离质谱（ESI-MS）用于分析在链转移剂（CTA）1-辛硫醇存在下，在60−140 °C温度范围内通过本体自由基聚合获得的完全转化的聚丙烯酸丁酯样品，所述链转移剂（CTA）1-辛硫醇的浓度在0和0.4 mol·L−1之间变化。在高达2000 m/z的可及质量范围内，通过携带引发剂和转移衍生片段的组合产物以及三种β-断裂产物进行终止。随后通过积分对所得质谱进行定量评价，以评估作为不同反应条件（即不同温度和CTA浓度）的函数的产物分布。本研究首次提供了定量的丙烯酸丁酯聚合产物分布数据。感兴趣的主要物种，被定义为对温度，CTA浓度或两者的变化最敏感的物种，被确定为硫醇封端的聚合物（TCPs）亲…
Electrospray ionization mass spectrometry (ESI-MS) is used to analyze poly(butyl acrylate) samples at full conversion obtained by bulk free radical polymerization in the temperature range of 60−140 °C in the presence of the chain transfer agent (CTA) 1-octanethiol at concentrations varying between 0 and 0.4 mol·L−1. Termination by combination products carrying initiator and transfer-derived fragments as well as three β-scission products were identified in the accessible mass range of up to 2000 m/z. The resulting mass spectra are subsequently quantitatively evaluated via integration to assess product distributions as a function of varying reaction conditions, that is, different temperatures and CTA concentrations. The present study provides for the first time quantitative product distribution data for butyl acrylate polymerization. The main species of interest, defined to be those most sensitive to variations in temperature, CTA concentration, or both, are identified to be thiol-capped polymers (TCPs) pro...