Adsorption Isotope Effect for Protio- and Deuteropolystyrene at a Single Solid Surface

Dagmar C. Leonhardt, Harry E. Johnson, Steve Granick

Research output: Contribution to journalArticle

Abstract

Infrared spectroscopy was employed, in the mode of attenuated total reflection (ATR), to measure PS adsorption to the native surface of a silicon infrared prism. Infrared spectra were collected, and the silicon ATR prism was prepared using methods described previously. The temperature of measurement was 30.0°C, which is the Θ temperature, Tθ, for deuteropolystyrene (PS-d) in cyclohexane.6 For protiopolystyrene (PS-h) in cyclohexane, Tθ = 34.5°C,6, so that PS-d at 30°C finds itself in a slightly better solvent than does PS-h. Calibrations showed that Beer's law held to a good approximation for these films of low adsorbance as expected,7 and that the PS free in solution (0.2 mg·mL-1) contributed only approximately 1% to the measured PS absorption peaks. At this solution concentration, PS-d and PS-h are completely miscible.

Original languageEnglish (US)
Pages (from-to)685-687
Number of pages3
JournalMacromolecules
Volume23
Issue number2
DOIs
StatePublished - Jan 1 1990

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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