Poly FTIR spectra

Figure 2. FTIR spectrum of poly(t-butyl styrene)-b-poly(t-butyl methacrylate) (10% TBMA by weight).

To simplify the synthetic effort required to deposit such films, attempts were made to deposit films by pyrolyzing tetrafluoro-p-xylene (F4C8H6). Under similar reaction conditions, a polymer film was deposited that was different from poly(tetrafluoro-p-xylylene) as the FTIR spectrum indicates that it contains more hydrogen and less fluorine. Presumably HF is preferentially eliminated rather than H2. 

Fig. 9.28 Analysis of the CH-stretching region (3000-2800 cm ) and the amide I band around 1650 cm V (a) ER-FTIR spectrum of poly(2-ethyl-2-oxazoline) (PEOx) as grown on the triflate functionalized HUT SAM. (b) ER-FTIR spectrum of HUT SAM. (c) Subtraction result of (a)-(b). (d) Bulk spectrum of PEOx. In the spectrum to the left, a significant shift...

Interaction of Poly-DCH With Liquid Chlorine. To liquid chlorine (5 ml) was added poly-DCH (57.4 mg) and the mixture was kept in a dry-ice/acetone bath for 22 hours, after which the remmning liquid chlorine was swept into a trap containing aqueous NaOH. The resultant orange solid, found to be amorphous by x-ray diffraction, was washed with dichloromethane to give 107 mg of product. This FTIR spectrum of this material exhibited tdssorption, inter alia, at 1440, 1085, 852, 799, and 744 cm, and its diffuse reflectance exhibited a broad maximum at ca 410 nm which tailed to beyond 600 nm. The materitd was partially soluble in hot dimethylformamide. 

Interaction of Poly-DCH With Aqua Regia. Poly-DCH (81.7 mg) was exposed to 40 ml of a 3 1 mixture of concentrated hydrochloric and nitric acids at 0°C for 29 hours. The material getined 149% in weight, became orange in color, was amorphous by x-ray powder diffraction, and dissolved in dimethylformamide. The FTIR spectrum revealed absorption at, inter alia, 1535, 1355, 854, 881, 755, 746, 719, 707, 697, and 693 cm" . 

Figure 1. a) FTIR spectrum of starting poly (IB-PMS) copolymer (bottom spectrum), b) FTIR spectrum of acid functionalized poly (IB-PMS) copolymer (middle spectrum), c) FTIR spectrum of ester functionalized poly (IB-PMS) copolymer (top spectrum). 

ATR-FTIR spectrum of poly (vinyl chloride) photograph pocket with phthalate plasticizer shows peaks due to both PVC and plasticizer. Units are wavelengths cm on the horizontal axis and per cent transmittance on the vertical axis. 

There are quite a number of differences between the FTIR spectrum of cw-polyacetylene and tran -poly-... 

Silica surface was treated with APS and modified with poly(acrylic acid), using the reaction illustrated in Scheme 1. The carboxyl groups on poly(acrylic acid) reacted with the APS amine functional groups to form salt bonds on the surface of silica. The salt-modified beads were heated in DMF at 140°C to form amide bonds. The FTIR spectrum of the APS-modified silica exhibited a peak at about 1600 cm due to the amino group in addition to the original silica peak. Treatment with poly(acrylic acid) produced new peaks at 1710 cm" and 1660 cm", indicating the carboxyl groups of poly(acrylic acid) and the amide bond formation between the poly(acrylic acid) and the bound APS, respectively. ... 

FIGURE 4.19 An example of an FTIR spectrum for three different example polymers poly(vinyl pyridine) (P4VP), polystyrene, and a poly(vinyl pyridine)-block-polystyrene (PS-b-P4VP). In the data shown, we can clearly see that the block copolymer has characteristics of both of its individual polymer block components. The C=C stretch mode is visible at about 1500 cm" for all three molecules. 

Figure 3. Pyrolysis FTIR. (a) Vapor phase IR spectrum of poly(styrene) pulse pyrolyzed at 750 C/10 sec. (b) TimsHosolved l rolysis-FTIR spectrum of CI-PVC (60 C/min to 900 C). (c) HCI vapor phase FTIR spectrum (3500-2500 cm-1) firam CI-PVC pyrolysis (60 C/min to 900 C in helium), (d) Time-resolved Pyrolysis-FTIR spectrum of ethylene-vinyl acetate copolymer (60 C/min to 900 C in helium).

Figure 2. Representative ATR-FTIR spectra of (a) PLA and (b) PLA film grafted with poly(acrylamide). Spectrum (a) shows the ester peak of PLA at 1756 cm ( ). Spectrum (b) shows a peak at 1654 cm ( ) representing amide peak .

Fig. 1. Comparison of amide V VCD for an identical sample of poly-L-lysine in D20 as measured on the UIC dispersive instrument (top) and on the ChirallRFT-VCD instrument (at Vanderbilt University, kindly made available by Prof. Prasad Polavarapu). Sample spectra were run at the same resolution for the same total time ( 1 h) in each case. The FTIR absorbance spectrum of the sample is shown below. VCD spectra are offset for sake of comparison. Each ideal baseline is indicated by a thin line, the scale providing a measure of amplitude. Noise can be estimated as the fluctuation in the baseline before and after the amide V, which indicates the S/N advantage of the single band dispersive measurement.

Figure 3.46. In situ IRRAS of poly-(3-methyl thiophene)(CI04 ) film in BU4NCIO4 in acetonitrile at -F0.35 V (with offset of -0.1 reflectance units) and poly-(3-methyl thiophene)(PF6 ) film in BU4NPF6 in acetonitrile at -1-0.65 V. Reference spectrum recorded at -0.35 V. Spectra were recorded using Bruker IFS-113V FTIR spectrometer with MCT detector. Spectral resolution was 4 cm and number of scans for each spectrum was 128. Reprinted, by permission, from E. Lankinen, G. Sundholm, P. Talonen, T. Laltinen, and T. Saario, J. Electroanal. Chem. 447, 135-145 (1998), p. 141, Fig. 6. Copyright 1998 Elsevier Science B.V.

Figure 4.38. (a) IR ATR microscopic spectra of clean hair (solid line) and hair-sprayed hair (dashed line), (b) Difference specfrum (solid line) and reference spectrum of poly(vinylacefafe) (dashed line). Spectra were measured with Nic-Plan microscope interfaced to Magna-IR (Nico-let Instrument Corp.) FTIR spectrometer. Sixty-four sample scans at resolution of 8cm were coadded and rationed against 64 background scans. Reprinted, by permission, from P. A. Martoglio, Nicolet Application Note, AN-9694, Nicolet Instrument, Madison, 1997. Copyright Nicolet Instrument Corp. 

NMR spectroscopy and Fourier transform infrared (FTIR) spectroscopy are the main techniques used to provide microstructure information that is especially important for differentiating Hevea rubber from other types of naturally occurring and synthetic poly-isoprene. Both proton ( FI) and carbon ( C) NMR spectroscopy are used to obtain spectra of natural rubber in solution, and are shown in Figure 1. In the NMR spectrum, the olefinic proton gives rise to a peak 5.0 ppm, the methylene protons 2.0 ppm, and the methyl protons 1.6 ppm. 

---