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Study of the consumption of TMI® in latex using attenuated total reflectance FTIR (ATR‐FTIR)
Author(s) -
He Y.,
Daniels E. S.,
Klein A.,
ElAasser M. S.
Publication year - 1997
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(19970906)65:10<1967::aid-app14>3.0.co;2-u
Subject(s) - attenuated total reflection , fourier transform infrared spectroscopy , isocyanate , emulsion polymerization , polymer chemistry , monomer , polystyrene , polymerization , materials science , acrylate , emulsion , chemistry , polyurethane , chemical engineering , organic chemistry , polymer , engineering
Attenuated total reflectance‐Fourier transform infrared (ATR‐FTIR) spectroscopy was used to study the mechanism for consumption of isocyanate groups from a dimethyl meta ‐isopropenyl benzyl isocyanate (TMI®) monomer. A series of polystyrene/poly(butyl acrylate‐ co ‐TMI) [PS/P(BA‐TMI)] core/shell structured latexes with different core/shell ratios were prepared by seeded emulsion polymerization techniques. These latexes were air‐dried on ATR‐FTIR germanium (Ge) discs while the FTIR spectra were taken during the film‐formation process. The amounts of isocyanate moieties which were reacted during polymerization and the film‐formation process were determined quantitatively using the FTIR data combined with titration calibration of the isocyanate groups. The thickness of the shell in which the TMI monomer was incorporated was found to be very important in determining the extent of consumption (hydrolysis) of the isocyanate groups during either polymerization or film formation. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 65: 1967–1973, 1997