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Surface Studies of Polymer Films and Fibers by CIRCLE ATR FT-IR
Volume 42, Number 1 (Jan. 1988) Page 163-166
Tiefenthaler, Ann M.; Urban, Marek W.
ATR FT-IR spectroscopy is a widely used technique for surface analysis. A less common FT-IR method is CIRCLE ATR, which was originally designed to study aqueous systems that are difficult to analyze due to strong water absorbance in transmission measurements. Recent studies of styrene/acrylic acid copolymer dissolved in aqueous solvent show that with the use of this technique it is possible to detect very low concentrations of solute (0.001 w/w). For our purposes this technique was modified for application to surface studies of flexible films and fibers.