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Characterization of Polystyrene Latices by Photoelectron and Infra-Red Spectroscopy

  • J. H. Stone-Masui
  • W. E. E. Stone

Abstract

Sulfur X-ray photoelectron spectra (XPS) have been measured for several freeze-dried polymer latices. The XP2 S2D spectra were recorded at low and room temperature. The samples were spread directly onto a gold support. Only one line for sulfur, at an energy of 169.5 eV was observed, thereby indicating the presence of sulfate groups.

XPS being essentially a surface method of analysis (investigation depth from the surface is from 10 to 40 A), an attempt of quantifying the number of these surface SO4 groups, by relative peak intensity measurements, has been made. These results have been correlated with conductometric titration data. Variations in sulfate contents were clearly observed. It was possible to detect the hydrolysis of sulfate groups either during the polymerization process or on storage of the acid form of the latex.

IR measurement on the same samples has also been performed giving some complementary information concerning carboxyl groups. It seems doubtful that they are formed as a result of the hydrolysis of sulfate groups. Spectra for samples having been pretreated in different ways are also compared.

Keywords

Sulfate Content Sulfate Group Conductometric Titration Polystyrene Latex Gold Support 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Press, New York 1980

Authors and Affiliations

  • J. H. Stone-Masui
    • 1
    • 2
  • W. E. E. Stone
    • 1
    • 2
  1. 1.Faculté des SciencesUniversité Libre de BruxellesBrusselsBelgium
  2. 2.Section de Physico-Chimie MinéraleLouvain-la-NeuveBelgium

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