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Surface and interfacial FTIR spectroscopic studies of latexes. XI. The effect of Sty/ n ‐BA copolymer composition on the orientation of SDOSS surfactant molecules
Author(s) -
Niu B.J.,
Urban Marek W.
Publication year - 1996
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19960418)60:3<371::aid-app10>3.0.co;2-6
Subject(s) - copolymer , styrene , fourier transform infrared spectroscopy , materials science , pulmonary surfactant , attenuated total reflection , morphology (biology) , polymer chemistry , analytical chemistry (journal) , spectroscopy , molecule , chemical engineering , polymer , chemistry , organic chemistry , composite material , physics , quantum mechanics , biology , engineering , genetics
These studies examine how various latex copolymer compositions, ranging from 100% n ‐BA to 50%/50% Sty/ n ‐BA, may influence sodium dioctylsulfosuccinate (SDOSS) mobility, diffusion, and orientation near the film–air (F–A) and film–substrate (F–S) interfaces. Polarized attenuated total reflection Fourier transform infrared spectroscopy is utilized to examine the surfactant behavior in Sty/ n –BA latexes at the F–A and F–S interfaces. Based on the analysis developed for the purpose of these studies, the highest concentration of SDOSS is detected near the F–A interface for 50%/50% Sty/ n ‐BA compositions. However, when the content of styrene in Sty/ n ‐BA compositions. However, when the content of styrene in Sty/ n ‐BA copolymer is diminished, the highest content of SDOSS is detected near the F–S interface. This behavior is particularly evident for 100% poly( n ‐BA) latexes. When SDOSS molecules are near the F–A and F–S interfaces, the SO 3 − Na + hydrophilic ends are preferentially parallel to the surface, whereas hydrophobic tails are perpendicular. © 1996 John Wiley & Sons, Inc.