期刊
APPLIED SPECTROSCOPY
卷 62, 期 9, 页码 941-947出版社
SOC APPLIED SPECTROSCOPY
DOI: 10.1366/000370208785793407
关键词
infrared spectroscopy; IR spectroscopy; orientation; conformation; structural absorbance; polymer; poly(ethylene terephthalate); PET; polarization modulation
资金
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Fond Quebecois de la Recherche sur la Nature et les Technologies (FQRNT)
- Canada Foundation for Innovation (CFI)
- Center for Self-Assembled Chemical Structures
Polarization modulation infrared linear dichroism (PM-IRLD) is often used for measurements of molecular orientation with high sensitivity and good time resolution. However, PM-IRLD is unable to provide the structural absorbance spectrum because it does not measure separately the parallel and perpendicular spectra. Here we propose a new method, named polarization modulation infrared structural absorbance spectroscopy (PM-IRSAS), to overcome this limitation of PM-IRLD. PM-IRSAS measures the dichroic difference and structural absorbance spectra simultaneously and, therefore, allows quantitative analysis of molecular orientation and conformation with 200 ms time resolution. The PM-IRSAS method was first validated through comparison with conventional polarized FT-IR spectroscopy using drawn polymer films. Second, it was demonstrated that the PM-IRSAS method can provide a quantitative analysis of dynamic orientation and conformation changes in PET films during deformation and crystallization processes.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据