کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1233048 | 968802 | 2009 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Photoacoustic infrared spectroscopy of polymer beads
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
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چکیده انگلیسی
Photoacoustic (PA) spectra of four types of polymer resin beads, ranging in size from 35 to 150 μm, were acquired using a Fourier transform infrared spectrometer capable of both rapid- and step-scan mirror movement. Thermal diffusion lengths were on the order of the particle sizes of the beads. The PA magnitude spectra were similar to absorption spectra; both positive- and negative-going features occurred in the phase spectra. The frequency dependences of the total PA intensities of the polymer resins and carbon black differed by a factor of about fâ0.30. The intensities of the weak bands in the ratioed spectra (resin beads/carbon black) displayed a similar dependence. Partial saturation caused a more gradual variation for the stronger bands, where the intensity is proportional to â¼fâ0.1-fâ0.2.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy - Volume 73, Issue 5, 1 September 2009, Pages 823-827
Journal: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy - Volume 73, Issue 5, 1 September 2009, Pages 823-827
نویسندگان
Qing Wen, Kirk H. Michaelian,