Spectroscopy Fourier transform photoacoustic

This paper evaluates how well photoacoustic Fourier transform spectroscopy can be used to study the shattering phenomenon of unreinforced, plasticised polyvinyl chloride roofing membranes. Spectra were obtained for an unreinforced PVC roof membrane in service for 6 years, 10 years, and 14 years were obtained, with corresponding controls. Measurements of the bands for... 

Photoacoustic Fouriers Transform Infrared Spectroscopy of Rubbers and Related Materials... 

DW Vidrine. Photoacoustic Fourier transform infrared spectroscopy of solid samples. Appl Spectrosc 34 314-319, 1980. 

Tsuge, A., Uwamino, Y., and Ishizuka, T., Determination of silicon dioxide in silicon carbide by photoacoustic infrared Fourier-transform spectroscopy, Appl. Spectrosc., 42, 168 (1988). 

Applications of visible/UV Fourier transform spectroscopy will continue to include those topics already mentioned. Additional areas of expansion will probably include amplitude spectroscopy5 55 which has proved useful in the past by providing both absorption magnitude and phase information on transmitting samples, photoacoustic spectroscopy which can determine the composition of opaque samples, time-resolved chemical kinetic studies, and optical probing of combustion processes. 

Journal of Elastomers Plastics 28, No.2, April 1996, p. 140-60 QUANTITATIVE CHARACTERISATION OF POLYMER STRUCTURE BY PHOTOACOUSTIC FOURIER TRANSFORM INFRARED SPECTROSCOPY Parker J R Waddell W H PPG Industries Inc. 

The potential use of photoacoustic Fourier transform IR spectroscopy in the quantitative analysis of polymers was explored by studying the determination of vinyl acetate in EVA, acrylonitrile in nitrile rubber, ethylene in EPDM, and styrene and vinyl butadiene in SBR. Despite the theoretical complexities of this technique, simple quantitative relationships could be found for many of these polymer analyses. 24 refs. 

Ratner BD (1988) The surface characterization of biomedical materials. In Ratner BD (ed) Progress in biomaterials engineering, vol 6. Elsevier, Amsterdam, p 13 Vidrine DW (1982) Photoacoustic Fourier transform infrared spectroscopy of solids and liquids. In Fourier transform infrared spectroscopy Fries T (1994) Deutscher Verband fiir Materialprufung, p 127 Sacher E (1988) The determination of the surface tensions of solid films. In Ratner BD (ed) Progress in biomaterials engineering, vol 6 Surface characterization of biomaterials. Elsevier, Amsterdam, p 53 Owens DK, Wendt RC (1969) J Appl Polym Sci 13 1741... 

Photoacoustic Fourier transform infrared (FTIR) spectroscopy studies performed by Moffat and coworkers [33] on Ci to C4 alcohols adsorbed over phospho-tungstic Keggin acidH3PWi2O40, demonstrated the formation of alkoxyl intermediates. The authors observed the chemisorption of 3-4 isopropanol molecules per Keggin anion after 5 to 10 h of exposure to the alcohol at 25°C. The alcohol initially adsorbs as a protonated species /-C3H7OHJ and forms isopropoxyl species upon evacuation at about 50°C. 

The photoacoustic effect was first discovered by Alexander Graham Bell in the early 1880s [18], but it was not applied to Fourier transform infrared (FTIR) spectroscopy until a century later [19,20], Significant advantages of FTIR photoacoustic spectroscopy (PAS) include the following (1) Spectra may be... 

Microphonic Fourier transform infrared photoacoustic spectroscopy (FT-IR/PAS) has emerged as a useful tool for characterizing fractions of a monolayer of organic species adsorbed on opaque, high surface area samples. Such a study of calcined and sulfided hydrodesulfurization catalysts will be discussed. 

FOURIER TRANSFORM INFRARED/ PHOTOACOUSTIC SPECTROSCOPY TO ASSESS SECONDARY STRUCTURE... 

Fourier transform infrared/photoacoustic spectroscopy (FT-IR/PAS) can be used to evaluate the secondary structure of proteins, as demonstrated by experiments on concanavalin A, hemoglobin, lysozyme, and trypsin, four proteins having different distributions of secondary... 

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