Schuchardt Patrick, Unger Miriam, Siesler Heinz W
Department of Physical Chemistry, University of Duisburg-Essen, Essen, Germany.
Anasys Instruments, 325 Chapala Street, Santa Barbara, CA, USA.
Spectrochim Acta A Mol Biomol Spectrosc. 2018 Jan 5;188:478-482. doi: 10.1016/j.saa.2017.07.044. Epub 2017 Jul 23.
In the present communication the potential of 2DCOS analysis and the spin-off technique perturbation-correlation moving window 2D (PCMW2D) analysis is illustrated with reference to spectroscopic changes observed in a data set recorded by in-line fiber-coupled FT-IR spectroscopy in the attenuated total reflection (ATR) mode during a polyurethane solution polymerization at different temperatures. In view of the chemical functionalities involved, hydrogen bonding plays an important role in this polymerization reaction. Based on the 2DCOS and PCMW2D analysis, the sequence of hydrogen bonding changes accompanying the progress of polymerization and precipitation of solid polymer can be determined. Complementary to the kinetic data derived from the original variable-temperature spectra in a previous publication the results provide a more detailed picture of the investigated solution polymerization.
在本通讯中，通过参考在不同温度下聚氨酯溶液聚合过程中，采用衰减全反射（ATR）模式的在线光纤耦合傅里叶变换红外光谱（FT-IR）记录的数据集中观察到的光谱变化，阐述了二维相关光谱（2DCOS）分析和衍生技术——扰动相关移动窗口二维（PCMW2D）分析的潜力。鉴于所涉及的化学官能团，氢键在该聚合反应中起着重要作用。基于二维相关光谱和扰动相关移动窗口二维分析，可以确定随着固体聚合物聚合和沉淀过程中氢键变化的顺序。与先前发表的原始变温光谱得出的动力学数据相辅相成，这些结果为所研究的溶液聚合提供了更详细的情况。
