Polymer Adsorption on Platinum: Surface Coverage Determination Using Iodide-125
In the reported experiments, adsorption of iodide-125, a gamma emitter, was used as a quantitative methodology for polymer adsorption surface coverage analysis. Adsorption of I-125 on clean platinum produced surface elemental ratios of I:Pt of 1:4. the technique was applied to the adsorption of polyethylene glycol terephthalate from trifluoroacetic acid on platinum flags with a 2-cm**2 surface area. This polymer adsorption is approximated by a logarithmic relationship similar to the Temkin isotherm. Polymer coverage attained up to 99. 6% of the surface.
T. M. Ellis and M. R. Van-De-Mark, "Polymer Adsorption on Platinum: Surface Coverage Determination Using Iodide-125," Journal of Polymer Science, Part A: Polymer Chemistry, Wiley-Blackwell, Jan 1981.
The definitive version is available at http://dx.doi.org/10.1002/pol.1981.170191008
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© 1981 Wiley-Blackwell, All rights reserved.