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Fourier transform infrared depth profiling

Fourier transform infrared step-scan photoacoustic spectroscopy was developed to study the composition of thermoplastic olefin films, as a function of depth below the surface. Infrared bands associated with talc, polypropylene (PP), and ethylene-propylene mbber (EPR) were used as depth-profiling probes to identify photoacoustic signals. Experiments were done at various modulation frequencies, enabling a stratification model to be developed. The uppermost layer (0-3 micrometre) showed large changes in talc and PP concentration, whilst the layer below showed a significant decrease in both the phases. In the third layer (6-9 micrometre), all three phases showed the maximum values. In the fourth layer (9-12 micrometre), the talc concentration reduced, whilst concentrations of EPR and PP were observed, decreasing with depth. 32 refs. [Pg.53]

Applied Spectroscopy 51,No.8,Aug.l997,p.l238-44 PHASE-RESOLVED DEPTH PROFILING OF THIN-LAYERED PLASMA POLYMER FILMS BY STEP-SCAN FOURIER TRANSFORM INFRARED PHOTOACOUSTIC SPECTROSCOPY... [Pg.84]

Fina, L.J. and Gangchi, C. (1991) Quantitative depth profiling with Fourier transform infrared spectroscopy. Vib. Spectrosc., 1, 353—361. [Pg.441]

See other pages where Fourier transform infrared depth profiling is mentioned: [Pg.49]    [Pg.45]    [Pg.89]    [Pg.2259]    [Pg.3718]    [Pg.182]    [Pg.72]    [Pg.961]    [Pg.902]    [Pg.406]    [Pg.180]    [Pg.199]    [Pg.638]    [Pg.399]   
See also in sourсe #XX -- [ Pg.226 , Pg.227 , Pg.228 , Pg.229 ]



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