کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9560717 | 1382001 | 2005 | 17 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
On the use of femtosecond laser ablation to facilitate spectroscopic depth profiling of heterogeneous polymeric coatings
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
Spectroscopic depth profiling of organic coatings is useful for characterizing the nature and spatial distribution of weather-induced aging on a coating system. Due to their highly heterogeneous compositions and general opacity, high-solids organic coatings can be extremely difficult to depth profile using established techniques. This work evaluates the feasibility of using femtosecond time-scale laser pulses as a method for preparing coating samples for the purpose of depth-resolved spectroscopic analysis. Samples were prepared by ablating square regions of various depths in military coating samples. Ablated regions were characterized morphologically using a custom scanning confocal profilometer and spectroscopically using Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy/Energy Dispersive Spectroscopy (SEM/EDS) and dispersive Raman spectroscopy. Depth profiles collected from ablated samples were compared with profiles of the same material collected using a cross-sectional transmission-mode FTIR technique. A threshold level was found, below which a compound-selective ablation process was observed. Additional ether cross-linking was found to occur at moderate/high energy levels. Material in the residual interaction volume showed indications of reconstituted urethane functionality.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer Degradation and Stability - Volume 89, Issue 3, September 2005, Pages 393-409
Journal: Polymer Degradation and Stability - Volume 89, Issue 3, September 2005, Pages 393-409
نویسندگان
Lionel T. Keene, Thomas Fiero, Clive R. Clayton, Gary P. Halada, David Cardoza, Tom Weinacht,