FMIR spectra

Literature values of the contact angles for various liquids on four of the five polymers used in this work are given in Table I. These values may be compared with those for our unirradiated polymers. In the case of polystyrene, exhaustive methanol or n-heptane extraction followed by drying did not result in a change in contact angles, and residual extractant could not be observed by means of frustrated multiple internal reflectance (FMIR) spectra of the films. 

Partial pictures of the irradiated polystyrene surfaces before and after each extraction were obtained by means of FMIR spectra of a film pressed on a KRS-5 prism. The spectra for a film exposed 5 hours are shown in Figure 9. The only significant change was a broad complex band in the carbonyl-stretching region near 1725 cm."1 other bands are shown for reference, since reproducible optical contact of the film with... 

Figure 9. Carbonyl-stretching region in polystyrene irradiated 5 hours in air at 30°C. FMIR spectra...

Figure 2 FMIR-IR spectrum of ffilDSO-plasma modified Kevlar (Plasma exposure = 90 sec.)...

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