Abstract
FTIR-ATR (Fourier Transform Infra-Red-Attenuated Total Reflection) has been used to analyze the surface composition of coalesced acrylic latex films. The behavior of two anionic surfactants has been characterized. It has been found that surfactant distribution depends on the nature of the surfactant. A comparison between the normalized absorbance in transmission and in reflection has shown an enrichment of surfactants at the surfaces of films with a coalescence time of 3 days. The surfactant concentration at the film-air interface is higher than at the film substrate interface. A concentration gradient exists through the film thickness. In addition, the incompatible surfactant migrates towards the interface as coalescence proceeds.
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Zhao CL, Holl Y, Pith T, Lambla M, in preparation
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Zhao, C.L., Holl, Y., Pith, T. et al. FTIR-ATR spectroscopic determination of the distribution of surfactants in latex films. Colloid & Polymer Sci 265, 823–829 (1987). https://doi.org/10.1007/BF01418459
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DOI: https://doi.org/10.1007/BF01418459