ATR-IR spectra

FIGURE 27.1 ATR-IR spectra of sulfuric acid-treated thermoplastic rubbers (TRs) with different styrene content. Immersion time = 0.5 min. (From Cepeda-Jimenez, C.M., Pastor-Bias, M.M., Ferrandiz-Gomez, T.P., and Martm-Martmez, J.M., Int. J. Adhes. Adhes., 21, 161, 2001.)... 

FIGURE 27.4 ATR-IR spectra of 2 wt% trichloroisocyanuric acid (TCI) solution in MEK-treated styrene-butadiene rubber (SBR). Application of the chlorinating agent by immersion or by brush. (From Romero-Sanchez, M.D., Pastor-Bias, M.M., and Martfn-Martfnez, J.M., J. Adhes. Sci. TechnoL, 15, 1601, 2001.)... 

Figure 13.15 ATR-IR spectra of various pora-substituted aryl isocyanides adsorbed on a palladium film [26].

ATR-IR spectra of PDI, CN-QH4-NC, adsorbed on a Pd film deposited on one face of a ZnSe crystal exhibit three v(N=C) peaks, at 2170, 2120 and 1960 cm" [26]. The 2120 cm" band is shifted only 8 cm" as compared with that for the free molecule and is assigned to the uncoordinated isocyanide group. The 2170cm" band is close to that observed for PDI adsorbed on Au film and was assigned an T) adsorphon mode. The 1960 cm" band is characteristic of an adsorption mode in which the N=C bond is weakened. The authors indicate two possible modes a bent T mode (B in Figure 13.1) or a mode (C in Figure 13.1) in which... 

The attenuated total reflection infrared (ATR-IR) spectra taken from organoclay, pure XNBR, and the vulcanizates filled with 5 phr clay and mixed at 160°C temperature, are depicted in Fig. 31. From the spectra, the principal peaks for the pure organoclay are observed at 2,846 cm-1 and 2,920 cm-1 due to the presence of... 

Fig. 31 ATR-IR spectra of organoclay, pure XNBR (gum), and 5 phr organoclay-filled XNBR vulcanizates mixed at 160°C...

Fig. 48 ATR-IR spectra of CR and XNBR and their blends in the presence and absence of organoclay...

Interfacial Ca(OH)2. After either the germanium plate was dipped through the interface of the CaCl2 solution, or the CaCl2 solution was deposited onto the germanium plate, the ATR IR spectra showed three peaks at wavelengths of 2.90, 4.65, and 6.15-/xm. The peak at 4.65 /xm, which was of uncertain origin, had the smallest intensity. Since in the... 

Figure 1. FTIR spectra of Clg monolayers (a) High-frequency range transmission-IR spectrum of two CI8/glass monolayers (one monolayer on each side), (b) ATR-IR spectra of C18/glass, and (c) CI8/aluminum (with oxide layer on top) prepared from 0.01M solution in HD, immersion time=30min.

Fig. 28 ATR/IR spectra a on the surface region of the sheet, and b of the cross-section of PP-gra/t-Poly(HEMA) sheet...

Figure 19. ATR-IR spectra of the as-prepared and methanol-treated SF matrices (a) as-spun SF-N (b) methanol-treated SF-N (c) as-cast SF-F (d) SF-M [75],...

Spectroscopy. Transmission and ATR IR spectra were obtained with a Perkin-Elmer Model 180 or 621 spectrometer. Absorption spectra were obtained on a Cary 14 spectrophotometer, while ESR spectra were obtained with a Varlan V-4502 spectrometer in the manner described elsewhere ( ). X-ray photoelectron spectra of the etched and unetched films were provided by Surface Science Laboratories, Palo Alto, Calif., using a Hewlett-Packard Model 5950 ESCA spectrometer. Some films were also examined with an International Scientific Instruments Model MSM-2 "Minl-Sem" scanning electron microscope. 

Photo/thermal Degradation. Although transmission or ATR IR spectra gave no Indication of a photo- or thermally-induced alteration In the POP microstructure, the uv-lrradlated or heated films showed a definite darkening or blackening. As may be seen from Table II, the rates for photolnduced blackening In etched and... 

Figure 3 ATR-IR spectra in the v(C=0) spectral region thin line, spectrum of solid ibuprofen dashed line, spectrum of PVP film thick line, spectrum of PVP with impregnated ibuprofen from SCCO2 solution. (From Ref. 27, copyright 2002 Elsevier Science.)...

Figure 6 ATR-IR spectra of PEG at 25°C (thin line) and during exposure to 60 bar of CO2 (thick line). (From Ref. 84, copyright Wiley-VCH Verlag GmbH.)...

KBr pellet or single bead samples are suitable for the purpose of solid-phase reaction monitoring and the study of reaction kinetics. For the KBr-embedded samples, a higher amount of resin material and longer sample preparation time is required, but these are compensated by the low costs for the measurement with KBr-pellets. The compromise here is the use of an ATR-instrumentation. With this technique the throughput of samples is much higher at low costs for additional equipment. ATR-IR spectra quality is at the same level than for the common methods mentioned before. 

Perkin Elmer Spectra 2000 spectrometer equipped with Durascope ATR (Sens IR Co.) at a resolution 2 cm 1 with 12 scans was used for measuring the ATR-IR spectra. 

Fig. 30. ATR-IR spectra of CO2 (bending mode) in the bulk (dashed lines) and within a layer of mesoporous silica (pore size 14.5 nm, solid lines) as a function of relative pressure. Conditions 294 K, = (a) 0.829, (b) 0.989, (c) 0.993, and (d) 1.00. Spectra are offset for clarity, and spectra (d) are scaled by a factor of 0.25. The reference spectra (both for the bulk and the silica phase) were recorded in the absence of CO2 94).

Figure 5.2 ATR-IR spectra of P4VP brushes in the as-grafted state fscdid and after con lexation of (dashed line/ A shoulder on the pyridine ring skeleton vibration at 1615 cnT appears after conydexation [3y.

Figure 10.12 (a) Full ATR-IR spectra of a helmet-grade PC/PET blend across nonweathered, accelerated weathering, and natural weathering conditions. Inset spectra showcase the differential across weathering conditions specific to alkyl composition consumption ( —CH ) at 3000-2800 cm and carbonyl formation ( —C=0) at 1800-1600 cm and (b) conformational isomers for the diphenyl carbonate bond in PC. 

Figure 10.18 (a) Full ATR-IR spectra across a representative American football helmet outer shell model from each of the four major helmet manufacturers and (b) American football helmet outer shells fixtured into an ATR-IR spectrometer. 

Benzoic acid has long been considered to be formed by benzaldehyde oxidation in the presence of oxygen, but was not bebeved to form under anaerobic conditions [95]. Here, when the reaction was performed under anaerobic conditions, benzoic acid was not detected in the effluent by gas chromatography (GC) analysis, but in situ ATR-IR spectra clearly showed its presence as an adsorbed benzoate species, indicated by bands at 1600, 1546,1422, and 1393 cm [94]. The fact that benzoate species are detected on the catalyst surface, but not in the effluent, suggests that these species are very strongly bound possibly at basic sites on the AljOj support The formation of benzoic acid/benzoate under anaerobic conditions was speculated to result from hydration of benzaldehyde via a germinal diol, followed by a dehydrogenation. This pathway is summarized as follows ... 

Figure 12.9 In situ ATR-IR spectra of benzyl alcohol in (a) Ar- and (b) air-saturated cyclohexane on a prereduced Pd/AljOj catalyst at 100°C. (a) Spectra were acquired after 0, 1, 2, 3, 4, 8, 15, 23, and 46 (bold) min time-on-stream. (b) Spectra were taken after 1.5,...

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