The changes in orientation of polymer chains during the drying of latex have been studied. The Fourier transform infrared spectroscopy-attenuated total reflectance (FT-IR ATR) technique was used to obtain dichroic ratios. The variable-angle ATR technique was used to profile the dichroic ratio changes at different depths in the films. Using the dichroic ratio and the Hermans orientation function, it was possible to monitor the orientation changes of the polymer chains during latex drying in real time. New insights into the film formation process during the different stages of drying and condensation were obtained.

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