Application of FT-IR Microsampling Techniques to Some Polymer Systems
An universal microsampling accessory that can be used to record the FT-IR transmission or reflection spectra of samples as small as 20 μm × 20 μm in linear dimensions is described. This accessory consists of an all-reflecting infrared microscope coupled with a small area, high sensitivity mercury-cadmiumtelluride detector. The use of this accessory for the study of imperfections in polymers, single filament polymer fibers, and the characterization of different layers in a multilayer polymers will be illustrated from their transmission spectra. A diamond anvil cell can be used in conjunction with the microsampling accesory to produce high quality FT-IR transmission spectra from thick polymer samples. Using a polarizer with the accessory, dichroic spectra of single filament polymer fibers can be obtained. In the reflection mode, the use of the accessory for the study of the cratering in paint panels will be described.
KeywordsTransmission Spectrum Reflection Mode Background Spectrum Diamond Anvil Cell Variable Aperture
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